EP3550145A1 - Pumpvorrichtung - Google Patents

Pumpvorrichtung Download PDF

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Publication number
EP3550145A1
EP3550145A1 EP19163777.6A EP19163777A EP3550145A1 EP 3550145 A1 EP3550145 A1 EP 3550145A1 EP 19163777 A EP19163777 A EP 19163777A EP 3550145 A1 EP3550145 A1 EP 3550145A1
Authority
EP
European Patent Office
Prior art keywords
compartment
zone
channel
opening
fluid
Prior art date
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.)
Granted
Application number
EP19163777.6A
Other languages
English (en)
French (fr)
Other versions
EP3550145B1 (de
Inventor
Alessandro PANNO
Marco Guidetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casappa SpA
Original Assignee
Casappa SpA
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Filing date
Publication date
Application filed by Casappa SpA filed Critical Casappa SpA
Publication of EP3550145A1 publication Critical patent/EP3550145A1/de
Application granted granted Critical
Publication of EP3550145B1 publication Critical patent/EP3550145B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms

Definitions

  • the present invention relates to a pumping apparatus. It can be used to drive loads, typically in trucks or tipper trucks.
  • volumetric gear pumps The use of a plurality of volumetric gear pumps is known, which are used to drive corresponding loads independently of each other.
  • the object of the present invention is to propose a pumping apparatus equipped with multiple pumping sections which makes it possible to reverse the direction of rotation in a simple way (without opening the pumping apparatus, but simply by modifying the fluid connections from the outside).
  • a further object of the present invention is to implement measures that allow minimising the risk of error during the reversal of the direction of rotation.
  • reference number 10 denotes a pumping apparatus.
  • the pumping apparatus 10 comprises a first reversible volumetric gear pump 1.
  • the first pump 1 comprises:
  • the apparatus 10 also comprises a second reversible volumetric gear pump 2.
  • the second volumetric pump 2 comprises:
  • the first and second pumps 1, 2 can also be defined as the first and second sections of the same pumping apparatus 10.
  • the first volumetric pump 1 draws in rotation the second volumetric pump 2, or vice versa.
  • a joint can be present which couples a toothed wheel of the first pair 11 (or an element integral therewith) with a toothed wheel of the second pair 21 (or an element integral therewith).
  • the first and second pumps 1, 2 are advantageously alongside each other.
  • a wheel of the first pair 11 is coaxial with a wheel of the second pair 21.
  • the first pump 1 is operatively interposed between a drive shaft connectable to the motor and the second pump 2.
  • the motor is suitably electrical or thermal.
  • the apparatus 10 further comprises a first channel 13 that places in fluid connection a first zone 121 of the first compartment 12 and a first zone 221 of the second compartment 22.
  • the apparatus 10 further comprises a second channel 23 that places in fluid connection a second zone 122 of the first compartment 12 and a second zone 222 of the second compartment 22.
  • the apparatus 10 further comprises means 3 for opening/closing the first and second channels 13, 23.
  • the apparatus 10 further comprises a first, a second, a third and a fourth openings 14, 15, 24, 25 intended to allow the fluid communication of the pumping apparatus 10 with the outside.
  • the apparatus 10 comprises an outer casing 4.
  • casing 4 is made of metallic material.
  • the first, second, third and fourth openings 14, 15, 24, 25 are fashioned on the casing 4.
  • first and third openings 14, 24 are fashioned on a first face 41 of the casing 4.
  • the second and fourth opening 15, 25 are instead fashioned on a second face 42 of the casing 4.
  • the second face 42 and the first face 41 are fashioned in separate areas of the casing 4.
  • the second face 42 is opposite the first face 41 (see for example figures 7 and 8 ).
  • the first and second openings 14, 15 allow direct access to the first and second zones 121, 122 of the first compartment 12.
  • the third and fourth openings 24, 25 allow direct access to an intermediate position of the first and second channels 13, 23.
  • the third and fourth openings 24, 25 respectively allow access to the first and second zones 221, 222 of the second compartment 22.
  • the apparatus 10 can assume at least a first and a second operating configurations. They correspond to distinct modes of operation associated with the reversibility of the first and second pumps 1, 2. In the second operating configuration the rotation direction of the first and of the second pair 11, 21 of wheels is opposite to that assumed in the first operating configuration.
  • Figures 1, 2 , 3 , 7, 8 exemplify the first configuration.
  • the first zone 121 of the first compartment 12 and the first zone 221 of the second compartment 22 define a suction respectively of the first and second pumps 1, 2, while the second zone 122 of the first compartment 12 and the second zone 222 of the second compartment 22 respectively define a delivery of the first and second pumps 1, 2.
  • the means 3 for opening/closing the first and second channels 13, 23 block the second channel 23. In this way they prevent the fluid communication between the second zone 122 of the first compartment 12 and the second zone 222 of the second compartment 22.
  • the means 3 for opening/closing in the first configuration allow the fluid communication of the first zone 121 of the first compartment 12 and the first zone 221 of the second compartment 22 through the first channel 13.
  • Figures 4 , 5 and 6 exemplify the second operating configuration.
  • the second zone 122 of the first compartment 12 and the second zone 222 of the second compartment 22 respectively define a suction of the first and second pumps 1, 2, while the first zone 121 of the first compartment 12 and the second zone 221 of the second compartment 22 respectively define a delivery of the first and second pumps 1, 2.
  • the means 3 for opening/closing the first and second channels 13, 23 block the first channel 13, thereby preventing communication between the first zone 121 of the first compartment 11 and the first zone 221 of the second compartment 22. Furthermore, in the second configuration they allow the fluid communication between the second zone 122 of the first compartment 12 and the second zone 222 of the second compartment 22 through the second channel 23.
  • both the first and second configuration there is a single inlet of the operating fluid in the apparatus 10: it is the first opening 14 in the first configuration and the second opening 15 in the second configuration. Having a single suction zone is particularly convenient.
  • both the first and second configuration there are at least two independent outlets of the operating fluid from the apparatus 10: for example, in the first configuration they are the second and the fourth opening 15, 25. They thus make it possible to deliver to two loads which are separate, and in an independent manner.
  • the apparatus 1 advantageously comprises a first hole 51 which connects the first channel 13 and the outside of the casing 4.
  • the means 3 for opening and closing the first and second channels 13, 23 comprise a first and a second stoppers 31, 32.
  • the first stopper 31, if applied to the first hole 51, allows the passage of fluid between the first and second compartments 12, 22 through the first channel 13.
  • the second stopper 32 if applied to the first hole 51, prevents the passage of fluid between the first and the second compartments 12, 22 through the first channel 13.
  • the second stopper 32 can comprise a pair of gaskets. If applied to the first hole 51, the second stopper 32 blocks the first channel 13, preventing the passage of fluid. In this case, the first channel 13 is blocked by a portion of the second stopper 32 interposed between the pair of gaskets (which therefore contribute to a sealing action).
  • this pair of gaskets could be absent.
  • the seal would be defined by the metal walls of the second stopper 32 (and would therefore be purely mechanical).
  • the apparatus 1 also comprises a second hole 52 which connects the second channel 23 and the outside of the casing 4.
  • the first and second stoppers 31, 32 can also be fitted into the second hole 52.
  • the second stopper 32 is fitted into the second hole 52 and the first stopper 31 is fitted into the first hole 51.
  • the second stopper 32 can prevent the fluid connection between the first and second compartments 12, 22 through the second channel 23.
  • the first stopper 31 instead allows the connection between the first and second compartments 12, 22 through the first channel 13.
  • the second stopper 32 is fitted into the first hole 51 and the first stopper 31 is fitted into the second hole 52.
  • the second stopper 32 prevents the fluid connection between the first and second compartments 12, 22 through the first channel 13 while the first stopper 31 allows the fluid connection between the first and second compartments 12, 22 through the second channel 23.
  • the first hole 51 extends between the first channel 13 and the third opening 24 while the second hole 52 extends between the second channel 23 and the fourth opening 25.
  • the second stopper 32 is suitable for penetrating further into the apparatus 10 (or better inside the casing 4) with respect to the first stopper 31. In this way (unlike the first stopper 31), it can reach and block the first or the second channel 13, 23.
  • the second stopper 32 comprises:
  • the cavity 324 is crossed by the fluid present along the second channel 23 and coming from the second pump 2 (thus allowing the crossing of the fourth opening 25).
  • the cavity 324 is crossed by the fluid present along the first channel 13 and coming from the second pump 2 (thus allowing the crossing of the third opening 24).
  • a third stopper 33 different from the first and second stoppers 31, 32 is used to block one among the third and the fourth openings 24, 25 (the other remaining open for the outflow of the fluid coming from the delivery of the second pump 2).
  • the first and second stoppers 31, 32 exert the function of allowing or not allowing the passage through the first or the second channel 13, 23.
  • the third stopper 33 is not fittable in the first and second holes 51, 52 intended for the first and second stoppers 31, 32. This is to minimise the risk of accidental errors by users when reversing the motion of the apparatus (which could compromise proper operation).
  • the operating principle of the schematic solution of figures 3 and 6 is also valid for the solution of figures 11 and 12 .
  • an inlet of the operating fluid into the apparatus 10 coincides with an inlet of operating fluid into the first pump 1.
  • the delivery of the first and second pumps 1, 2 are not mutually communicating. Therefore, an independent delivery of various loads is possible.
  • the delivery of the first and second pumps 1, 2 are located side by side (or otherwise formed along a same side of the casing 4).
  • the pumping apparatus 1 comprises a lubrication path 90 of bushings 94 supporting one or more support shafts of the first and/or second pair of toothed wheels 11, 21 (see figures 9 and 10 ).
  • the lubrication path 90 draws the fluid from the first and/or from the second compartment 12, 22 and conveys it in an environment 93 downstream of the bushings 94 and at least partially delimited by an oil seal.
  • This environment 93 must be at low pressure in order to avoid the breakage of the oil seal separating it from the outside. In fact, the outside will typically have atmospheric pressure.
  • the apparatus 1 comprises a hinge 91 that connects the first and second holes 51, 52 and which is in communication with such environment (through a section 92).
  • such switch 91 connects a bottom of the first hole 51 and a bottom of the second hole 52.
  • the present invention achieves important advantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Massaging Devices (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
EP19163777.6A 2018-04-05 2019-03-19 Pumpvorrichtung Active EP3550145B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000004230A IT201800004230A1 (it) 2018-04-05 2018-04-05 Apparato di pompaggio

Publications (2)

Publication Number Publication Date
EP3550145A1 true EP3550145A1 (de) 2019-10-09
EP3550145B1 EP3550145B1 (de) 2020-08-05

Family

ID=62751394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19163777.6A Active EP3550145B1 (de) 2018-04-05 2019-03-19 Pumpvorrichtung

Country Status (3)

Country Link
EP (1) EP3550145B1 (de)
CN (1) CN110345065B (de)
IT (1) IT201800004230A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112524020B (zh) * 2020-12-28 2024-03-19 合肥皖液液压元件有限公司 一种大排量高压齿轮泵

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280392A (en) * 1940-01-10 1942-04-21 Vickers Inc Power transmission
GB882248A (en) * 1956-12-11 1961-11-15 Georg Wiggermann Improvements in variable capacity gear pumps
EP0685650A1 (de) * 1994-05-31 1995-12-06 SALAMI S.p.A. Aussenzahnradhydraulikeinrichtung
EP2154372A1 (de) * 2008-08-12 2010-02-17 Settima Flow Mechanisms Srl. Zahnradpumpe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2199333Y (zh) * 1994-06-09 1995-05-31 青州液压件厂 具有一个吸入口的双联齿轮泵
CN100476210C (zh) * 2007-06-15 2009-04-08 王晓忻 内啮合齿轮泵或马达
US8037670B2 (en) * 2008-09-05 2011-10-18 Masahiro Ikemura Bi-directional converter between pressure and rotational force
CN201526451U (zh) * 2009-09-13 2010-07-14 王旭 新型不等螺距螺套的双螺杆泵
CN203130493U (zh) * 2013-03-13 2013-08-14 无锡英特帕普威孚液压有限责任公司 高压双向旋转齿轮泵
ITAN20130102A1 (it) * 2013-05-30 2014-12-01 Marzocchi Pompe S P A Pompa o motore idraulico ad ingranaggi a dentatura elicoidale con sistema idraulico per il bilanciamento di forze assiali.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280392A (en) * 1940-01-10 1942-04-21 Vickers Inc Power transmission
GB882248A (en) * 1956-12-11 1961-11-15 Georg Wiggermann Improvements in variable capacity gear pumps
EP0685650A1 (de) * 1994-05-31 1995-12-06 SALAMI S.p.A. Aussenzahnradhydraulikeinrichtung
EP2154372A1 (de) * 2008-08-12 2010-02-17 Settima Flow Mechanisms Srl. Zahnradpumpe

Also Published As

Publication number Publication date
CN110345065B (zh) 2022-11-08
CN110345065A (zh) 2019-10-18
EP3550145B1 (de) 2020-08-05
IT201800004230A1 (it) 2019-10-05

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