EP4191020A1 - Pompe satellite - Google Patents

Pompe satellite Download PDF

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Publication number
EP4191020A1
EP4191020A1 EP22460060.1A EP22460060A EP4191020A1 EP 4191020 A1 EP4191020 A1 EP 4191020A1 EP 22460060 A EP22460060 A EP 22460060A EP 4191020 A1 EP4191020 A1 EP 4191020A1
Authority
EP
European Patent Office
Prior art keywords
compensation
duct
pump
satellite
ring
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.)
Pending
Application number
EP22460060.1A
Other languages
German (de)
English (en)
Inventor
Pawel Sliwinski
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.)
Politechnika Gdanska
Original Assignee
Politechnika Gdanska
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 Politechnika Gdanska filed Critical Politechnika Gdanska
Publication of EP4191020A1 publication Critical patent/EP4191020A1/fr
Pending legal-status Critical Current

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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
    • F04C2/12—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
    • 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
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention refers to a satellite pump applicable particularly in hydraulic drives of machines and devices.
  • a satellite hydraulic motor consisting of a planet, tooth geared with numerous satellites geared with multi-humped external cam with numerous humps directed inwardly, referred to as curvature is known from the patent description PL no. 71329 .
  • a satellite pump whose body is constructed in the form of an open cylindrical vessel containing centrally-located curvature and rotating shaft on which a planet is mounted is known from the Polish patent description PL 391422 . Satellites cooperate with the curvature and the planet. A space created amidst planet, curvature and satellites is closed with the timing plates which in turn are pressed with the suction and discharge manifolds.
  • the pump body throughout its whole perimeter, features radially situated, preferably at equal distances, suction holes, preferably of circular cross-section, whereby the suction holes are located coaxially with the holes located in the inner pump manifold.
  • the pump body around the suction holes features rotationally placed suction manifold with possibly large cross-section of the transverse fluid flow duct, allowing the supply of the fluid from the suction duct to the suction holes in the pump body.
  • Timing plate on the side of the high pressure acts simultaneously as a compensation plate.
  • a construction for the axial clearance compensation unit of satellites and planet in a hydraulic satellite motor in which one compensation space is connected by means of a duct with an inner duct supplying the working mechanism of the motor, while the other compensation space is connected by means of a duct with the inner discharge duct from the working mechanism of the motor is known from the Polish patent description PL 215061 .
  • the axial clearance compensation unit of satellites and planet in a hydraulic satellite motor or pump reduces internal leaks in the machine and thus improves machine efficiency.
  • providing - constructing and designing a correctly working compensation (compensation unit) is not a simple and obvious task. This constituted the objective of the invention, especially taking into account the drawbacks of the known constructions.
  • Satellite pump known from PL 391422 features two inner manifolds: suction manifold and discharge manifold, and a collective suction manifold located rotary on the pump body. Due to that, the dimensions of the pump are significant and it is quite heavy. Moreover, only the timing plate with the discharge holes (on high-pressure side) is balanced. However, the timing plate with the supply holes is adversely bent towards the suction manifold by forces originating from the pressure in the working chambers. At the same time, the direction of the deformation is adversely on the outside of the working mechanism.
  • both compensation spaces are connected with each other through the circumferential backlash along the bolts which axially integrate the elements of the machines, as described in PL 185724 .
  • the pressure in both compensation chambers is the same as in the inner duct supplying the motor. Both compensation plates deform to the same extent. If the check valve does not operate properly, there is an undesirable leak of the fluid from the high pressure duct through the compensation chambers to the low pressure duct. This causes incorrect operation of the compensation, increase of the axial play and the occurrence of an additional, undesirable leak in the gaps of the working mechanism.
  • the pressure in the compensation chamber depends on the location of the duct in relations to the flat gap created by the planets and compensation plates. Moreover, a large compensation field is required which causes an increase of the dimensions of the positive displacement machine.
  • the goal of the invention was to provide a construction of a satellite pump free of the drawbacks.
  • the rear body features - there is - at least two inner ducts, preferably of circular cross-section, placed, preferably, parallel to the axis of the shaft, preferably spaced equally around the bearing placed in the rear body and preferable between this bearing and the edge of the suction duct.
  • the front of the pump is where the shaft end neck is visible, while the rear is on the opposite side, which regards the explanation of the usage of the rear body located on the opposite side in relations to the shaft end neck.
  • the pump comprises a satellite working mechanism constituting a curvature with humps, a planet and satellites.
  • the inner ducts connect the suction duct with the ring duct.
  • the ring duct is lead - form in the rear body coaxially with the shaft and coaxially with the rear body and it is adjacent - is in neighbouring - adjoin to the rear compensation plate situated between the satellite mechanism and rear body. Compensation plate is, at the same time, the timing plate.
  • the rear compensation plate at the height of the ring duct, there are suction holes whose number equals the number of the humps of the curvature in the satellite mechanism, located at equal distance from one another and at the same distance from the axis of the pump shaft. The suction holes connect the ring duct with the low-pressure chambers in the satellite mechanism.
  • the low pressure chamber is a space created by the planet, curvature and two adjacent satellites in such a way that it increases its volume during the revolution of the planet.
  • a ring-shaped compensation chamber is placed coaxially with the shaft in the rear body. This compensation chamber is adjacent - adjoin to the rear compensation plates on which it creates a ring-shaped compensation field, whereby the inner diameter of the compensation chamber and ring-shaped compensation field is larger than the diameter of the opening for the shaft in the rear compensation plate, while the outer diameter of the compensation chamber and compensation field is lower than the inner diameter of the ring duct.
  • Pump shaft is located in this opening.
  • the rear compensation plate features at least one compensation hole connecting the compensation chamber with at least one high-pressure working chamber in the pump satellite mechanism.
  • High-pressure chamber is an area created by the planet, curvatures and two adjacent satellites in such a way that it decreases its volume during the revolution of the planet.
  • the rear body of the pump is connected with the central body of the pump in a detachable manner, for example by means of at least two equally spaced screws.
  • the central body is connected to the front body also in a detachable manner, for example by means of at least two equally spaced screws.
  • Front body and central body can constitute a whole element in another design variant and in this case the part is defined as the central body.
  • central body and front body constitute two separate elements connected, for example, with screws.
  • the central body apart from the satellite mechanism, houses the front compensation plate and the manifold. Front compensation plate is located between the satellite mechanism and the manifold.
  • the manifold is adjacent to the front body if the front body constitutes a separate part or to the central body in its front part if the central and front body are a single part.
  • the advantage of this solution according to the invention consists in obtaining a large inner diameter of the suction duct, i.e. due to making the inner diameter that is not larger than the inner diameter of the central body.
  • Essential features of the invention include: at least two inner ducts and an aggregate ring duct distributing the fluid to the suction holes in the rear compensation plate. Due to this, there is a low drop of pressure in the inner ducts - from the external connection of the pump to the rear compensation plate, complete filling of the working chambers of the pump (avoiding cavitation) at the whole range of the rotation velocity of the pump and high volumetric efficiency of the pump.
  • Essential feature of the pump comprises in the ring-shaped compensation chamber placed in the rear body of the pump, adjacent to the rear compensation plate.
  • the pressure in the compensation chamber equals the pressure occurring in the high-pressure working chamber of the pump and is obtained through the compensation holes in the timing plate. Pressure in the compensation chamber acts on the rear compensation plate. Due to this the compensation plate is exposed to the action of the force pushing it towards the planet and satellites causing, at the same time, the decrease of the axial play of these elements. Decrease of the axial play causes preferable decrease of leaks and, hence, a preferable increase of the volumetric efficiency.
  • Fig. 1 presents the construction of the satellite pump
  • Fig. 2 presents the transverse cross-section A-A according to Fig. 1 through the satellite mechanism, indicating the curvature O, planet P, satellites S.
  • Fig. 3 presents the detail A of the pump according to Fig. 1
  • Fig. 4 presents the transverse cross-section B-B of the pump according to Fig. 1.
  • Fig. 1, Fig. 2 , Fig. 3, Fig 4 are shared by all the examples.
  • Fig. 5 presents the view to the face of the rear body in the cross-section C-C according to Fig. 1 with circular inner ducts KW
  • Fig. 6 presents the view to the face of the rear body in the cross-section C-C according to Fig. 1 with non-circular inner ducts KW.
  • Satellite pump applicable in hydraulic system was developed in a manner described below.
  • a satellite pump has been constructed with the following parts: front body 1, central body 2, rear body 3, satellite working mechanism constituting the curvature O, planet P and satellite S, manifold 4, front compensation plate 5, rear compensation plate 6, shaft 7, bearings 8 and 9, gaskets 10 and 11, and cover 12 which seals the bearing.
  • Central body 2 is attached to the front body 1 with screws 13.
  • Rear body 3 is attached to the central body 2 with screws 14.
  • the shaft is supported by the bearing 8 mounted in the front body and by the bearing 9 mounted in the rear body 3.
  • Planet P is fitted in the middle section of the shaft 7.
  • Central body houses the curvature O which is fixed by means of at least one pin 15. Satellites S are fitted between the curvature O and planet P.
  • the number of satellites S equals the sum of the number of the humps on the curvature O and planet P.
  • the number of satellites is 10.
  • Rear compensation plate 6 is located between the working mechanism and the rear body 5.
  • the manifold 4 is located in the central body 2, between the front body 1 and front compensation plate 5, the manifold 4 is located.
  • the manifold houses a gasket 10.
  • Gasket 11 is located in the rear body 3, between bearing 9 and rear compensation plate 6.
  • the rear body 3 features the suction duct KS of a circular cross-section.
  • the axis of the duct KS coincides with the axis of the shaft 7.
  • Bearing 9 is separated from the suction duct KS with the cover 12.
  • the suction duct KS around the bearing 9 and there are sixteen equally spaced circular inner ducts KW, whose axes are parallel to the axis of the shaft 7.
  • the diameter Dkw of the inner duct KW is lower than a half of the difference of diameters of the suction duct KS and outer diameter of the bearing 9 and in this case it is 5 mm.
  • a ring duct KP is implemented in the front section of the rear body 3, adjacent to the rear compensation plate 6, a ring duct KP is implemented.
  • Inner ducts KW connect the suction duct KS with the ring duct KP.
  • Low-pressure working chambers KNC of the pump are connected to the ring duct KP with the holes OS made in the rear compensation plate 3.
  • the number of the holes OS equals the number of the humps on the curvature O. In the embodiment presented in the drawings, i.e. fig. 1 and fig. 4 , the number of the holes OS equals 6.
  • the rear body 3 features ring-shaped compensation chamber KK ( fig. 1 and fig. 3 ), situated coaxially with the body.
  • the compensation chamber KK rests on the rear compensation plate 3 and is sealed with two gaskets 16 and 17.
  • the compensation chamber KK is connected to the high-pressure working chambers KWC through the compensation holes OK ( fig.3 and fig. 4 ).
  • the number of the holes OK equals the number of the humps on the curvature O. In the embodiment presented in figures, the number of the compensation holes OK is 6.
  • the increase of the volume of the low-pressure working chamber KNC makes the pressure in the chamber lower than the pressure occurring in the pump connection A.
  • the flow of liquid from the suction connection PS through the inner ducts KW through the ring duct KP and six suction holes OS is forced to the working chambers KNC.
  • the fluid flows from the high-pressure working chambers KWC through discharge holes OT through the manifold 4 to the discharge connection PT located in the central body 2.
  • a satellite pump was developed similarly to the method described above with such an exception that instead of the inner ducts KW of a circular cross-section, a lower number of kidney-shaped ducts with a larger area of the cross-section was applied.
  • the shape of the ducts KW is defined by the outer Dzkp and inner Dwkp diameter of the ring duct KP.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP22460060.1A 2021-12-01 2022-11-16 Pompe satellite Pending EP4191020A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL439702A PL244928B1 (pl) 2021-12-01 2021-12-01 Pompa satelitowa

Publications (1)

Publication Number Publication Date
EP4191020A1 true EP4191020A1 (fr) 2023-06-07

Family

ID=84689284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22460060.1A Pending EP4191020A1 (fr) 2021-12-01 2022-11-16 Pompe satellite

Country Status (2)

Country Link
EP (1) EP4191020A1 (fr)
PL (1) PL244928B1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL71329B1 (fr) 1971-12-01 1974-06-29
PL215061A1 (fr) 1978-05-20 1980-01-14 Eickhoff Geb
PL219147A1 (fr) 1979-10-23 1981-06-05 Univ Warszawski
US4674964A (en) * 1984-02-15 1987-06-23 Barmag Ag Gear pump having multiple outputs
PL185724B1 (pl) 1997-07-31 2003-07-31 Bohdan Sieniawski Maszyna wyporowa typu obiegowo-krzywkowego z kompensacją luzów osiowych, zwłaszcza jako silnik hydrauliczny o dużej chłonności właściwej
PL391422A1 (pl) 2010-06-07 2011-12-19 Politechnika Gdańska Pompa satelitowa
CN202402575U (zh) * 2011-12-28 2012-08-29 宁波市恒通液压科技有限公司 非圆行星齿轮机构
EP3187733A1 (fr) * 2015-12-29 2017-07-05 FAMA Spólka z ograniczona odpowiedzialnoscia Machine hydraulique volumétrique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL71329B1 (fr) 1971-12-01 1974-06-29
US3852002A (en) * 1971-12-01 1974-12-03 Zaklady Urzadzen Okretowych Hy Gyrating-cam engine, particularly as a hydraulic engine
PL215061A1 (fr) 1978-05-20 1980-01-14 Eickhoff Geb
PL219147A1 (fr) 1979-10-23 1981-06-05 Univ Warszawski
US4674964A (en) * 1984-02-15 1987-06-23 Barmag Ag Gear pump having multiple outputs
PL185724B1 (pl) 1997-07-31 2003-07-31 Bohdan Sieniawski Maszyna wyporowa typu obiegowo-krzywkowego z kompensacją luzów osiowych, zwłaszcza jako silnik hydrauliczny o dużej chłonności właściwej
PL391422A1 (pl) 2010-06-07 2011-12-19 Politechnika Gdańska Pompa satelitowa
CN202402575U (zh) * 2011-12-28 2012-08-29 宁波市恒通液压科技有限公司 非圆行星齿轮机构
EP3187733A1 (fr) * 2015-12-29 2017-07-05 FAMA Spólka z ograniczona odpowiedzialnoscia Machine hydraulique volumétrique

Also Published As

Publication number Publication date
PL439702A1 (pl) 2023-06-05
PL244928B1 (pl) 2024-04-02

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