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
  • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/5109—Convertible
  • Y10T137/5283—Units interchangeable between alternate locations
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/85978—With pump
  • Y10T137/86035—Combined with fluid receiver
  • Y10T137/86059—Hydraulic power unit

Definitions

• the invention relates to a device for pumping fluid with a hydraulic pump and a drive device, wherein the hydraulic pump can be coupled as an independent component with different types of drive devices as further components in the manner of a modular system and is designed as a coupling piece for this purpose, with different types being the third type Hydraulic tanks, in particular with different tank volumes, are provided and the respective hydraulic tank can be connected to the coupling piece from one side and the respective drive device can be connected to the coupling piece from the opposite side or on the same side.
• DE-A-195 14 749 describes a generic device for pumping fluid with a radial piston pump as a hydraulic pump and a drive device for operating the same.
• the known device is also constructed modularly in the manner of a modular system, the independent component with the radial piston pump forming a multi-part base body which is of such a large size in the axial direction that the known pump device is large overall and therefore not in everyone Installation, especially in confined spaces space constraints can be used. Due to the large number of individual piston pump elements required for the radial piston pump, there is also a certain susceptibility to malfunctions in operation. Furthermore, with regard to the variety of parts, the provision and use of the radial piston pump as a hydraulic pump is complex and expensive.
• Such pump devices which are also referred to as pump units, are used, among other things, for lifting but also for lowering loads by means of hydraulic devices, for example in
• DE-A-32 27 926 proposes a hydraulic unit with a flange-like basic plate, on the one side surface of which a hydraulic pump and a tightly enclosing housing serving as a container for the hydraulic medium are fastened, on the other side surface of which is replaceable and an electric motor is arranged opposite the pump, the drive shaft of which is coaxial with the drive shaft of the pump and perpendicular runs to the two side surfaces.
• the hydraulic pump is part of the hydraulic tank, which reduces its storage volume.
• the aforementioned flange-like base plate is provided with bores, openings or the like, which form all the necessary connecting and connecting lines for the attachment of different hydraulic pumps, motors, valves, control elements or the like, and in each case on one side or circumferential surface of the flange-like base plate end where, if necessary, fasteners for the components mentioned and for their connection are provided.
• the known hydraulic unit as a pump device also has a large construction and cannot be used in every application in particularly cramped installation conditions.
• the invention has for its object to further improve the known devices for pumping fluid in such a way that their manufacturing costs and thus the costs are reduced and that one can meet a variety of customer requirements with few components. Furthermore, the invention has for its object to provide a functionally reliable pump unit which, without having to reduce the tank volume of a tank container, can be accommodated in a space-saving manner even in extremely cramped installation conditions and yet is just as powerful as a comparable product in the prior art , A relevant object is achieved by a device having the features of claim 1 in its entirety.
• the coupling piece is formed in one piece and in the manner of a base plate and that the hydraulic pump is an external gear pump, the gear wheels of which are completely accommodated and integrated in the base plate, is achieved with as few components as possible , a pump device can be assembled as a compact unit for a large number of applications.
• the available components can be combined to create the sales unit according to customer specifications.
• a modular system is thus achieved with the device according to the invention, with the same parts realizing a high variance of different embodiments at a low cost level.
• the hydraulic pump in the form of an external gear pump is accommodated in the base plate and is fully integrated, the full tank volume of the tank unit to be connected is available. Incidentally, the length of the fluid lines and control lines is reduced by the integration of the external gear pump in the base plate, which accommodates reliable operation with low pressure losses.
• the functional reliability is also conducive to the fact that the external gear pump manages with only two gear wheels as the actuating and drive element, which on the one hand also saves installation space and on the other hand is inexpensive. Otherwise, the external gear pump can be more easily calculated from its volume throughput for a wide variety of applications and can be designed from its geometric dimensioning.
• the hydraulic ikpump can also be replaced simply by replacing the coupling piece, due to the plate-like structure of the coupling piece the hydraulic pump itself is also easily accessible for repair and maintenance purposes.
• the device shown in the figures is used for pumping and therefore for conveying fluid by means of a hydraulic pump 10 which can be driven by a drive device 12.
• the hydraulic pump 10 can be coupled as an independent modular component with different types of drive devices 12 as further components in the manner of a modular system and is designed for this purpose as a coupling piece 14 from the housing side.
• Various hydraulic tanks 16 are provided as the third type of components, in particular with different tank volumes, the respective hydraulic tank 16 from one side to the coupling piece 14 and the respective drive device 12 from the other, opposite one another. opposite side (see Fig. 1 and 3) or on the same side (see Fig. 2) of the coupling piece 14 can be connected to this. 1 to 3, essentially only one type of hydraulic tank 16 is shown, which can be refilled with fluid, in particular hydraulic oil, via a refill nozzle 18.
• the coupling piece 14 has as the hydraulic pump 10 a gear pump 20 as an external gear pump with two intermeshing corresponding gear wheels 22 as conveying means.
• the wheels 22 of the gear pump 20 are received in a pump chamber 24 of the coupling piece 14 and are rotatably guided in bearing bushes (not shown in detail) of the coupling piece 14.
• the interior of the respectively connected hydraulic tank 16 is connected to the interior of the pump chamber 24 in a fluid-carrying manner via a suction line 26, specifically at the point of transition to the coupling piece via a suction flange 28 (cf. FIGS. 1 and 3).
• a suction line 26 specifically at the point of transition to the coupling piece via a suction flange 28 (cf. FIGS. 1 and 3).
• the suction line 26 can be omitted and the fluid supply takes place directly via the suction flange 28, which is arranged this time on the drive device 12.
• a vertically running delivery line 30 is present within the coupling piece 14 and connects the pump chamber 24 to the environment in a fluid-carrying manner.
• a spring-loaded check valve 32 which opens against the spring action as soon as the hydraulic pump 10 is put into operation in order to supply a consumer with fluid, for example in the form of a lifting device.
• Device for a lifting platform, car lift or the like. To supply with pressurized fluid.
• a branch line 34 opens transversely into the delivery line 30 and is connected to a pressure protection device (valve), not shown, in order to protect the hydraulic system against pressure peaks in the sense of overload protection.
• valve pressure protection device
• the feed opening of the suction flange 28 only partially opens into the pump chamber 24 with the gear pump 20.
• An electric motor in particular a three-phase motor 36 according to FIGS. 1 and 2, or a direct current motor 38 according to FIG. 3 serves as the drive device 12.
• the three-phase motor 36 in the illustration according to FIG. 2 is arranged inside the hydraulic tank 16 and is therefore an integral part of the tank.
• the pump unit in question with a so-called sub-oil motor therefore takes up little installation space, but also reduces the amount of fluid available within the hydraulic tank 16.
• a hydraulic drive would also be conceivable as the drive device 12. As shown in FIGS.
• the coupling piece 14 has on its one free side a flange part 40 which can be overlapped by the free end of the respective hydraulic tank 16, a sealing means 42 in the form of a sealing ring being arranged at the location of the overlapping ,
• the coupling piece 14 has a further flange part 44, which is designed in the manner of a cover and can be connected to the hydraulic pump 10 and / or to the drive device 12.
• the further flange part 44 is adapted to the flange part 40 and, like the flange part 40, provides a radial recess 46 on the outer circumferential side for the engagement of the sealant 42, provided that Tank 1 6, as shown in Figure 2, is placed on the further flange part 44.
• Both flange parts 40, 44 have a ring recess in the middle for receiving the suction flange 28 or for receiving the respective drive train 48 of the drive device 12.
• the drive device 12 can therefore be coupled with its drive train 48 to the hydraulic pump 10, at least a fluid seal 50 in the form of an annular seal is present at the location of the drive train 48 within the further flange part 44. In this way, a secure fluid seal of the interior of the pump device from the environment is achieved via the mentioned sealing means.
• a control device (not shown in more detail) can be seen on the upper side of the coupling piece 14 when viewed in the direction of the figures and can be connected to the coupling piece 14 via the bores 52.
• the relevant control device can include hydraulic controls for the supply of fluid to the consumer as well as entire hydraulic control blocks.
• the individual components of the modular pump unit can be fixed to one another using standard screw connections. Since the hydraulic part 16 is a closed structural unit, the pump unit is operated in a closed system, ie only the fluid content of the hydraulic tank 16 is used to supply a consumer to be controlled. Since the fluid-carrying lines are integrated within the coupling piece 14, there is no separate seal compared to known solutions or piping necessary.
• the flange parts can be ideally manufactured inexpensively from cast parts.
• the drive devices 12 mentioned can represent purchased parts and the material of the tank 16 can be made of plastic or sheet steel. From- The actual gear pump 20 can be pressure-compensated but not pressure-compensated.
• the actual gear pump 20 with its external gears 22 is seen in the direction of looking at the figures together with the delivery line 30 in a vertically running center plane of the flange-like coupling piece 14 and the drive axes for the gears 22 lie together with the longitudinal axis of the drive train 48 in planes transverse to the one addressed Longitudinal median plane, which represents the section along the line II - II in Fig.1 (see Fig.5).
• the free end of the drive train 48 can be designed in the manner of a connecting pin which engages in a receiving groove 54 of the cylindrical drive part 56 for one of the two gearwheels 22, only one gearwheel 22 being drivable in this way via the drive train 48 and the gearwheel 22 driven in this way takes the additional gear 22 for a pumping operation by engaging the teeth in one another accordingly.
• the coupling piece 14 as the hydraulic pump 10 is the central structural unit, which can be coupled as desired with hydraulic tanks 16, drive devices 12 and control devices (not shown in detail) and consumers as a system solution.
• the coupling piece 14 is designed as a one-piece solid base plate body in the manner of a fastening plate and is penetrated only by the supply and control lines and the gear elements of the gear pump 20.
• the gears 22 of the external gear pump 20 are housed approximately centrally in the solid base plate of the coupling piece 14, so that a low-vibration drive results in operation, which promotes the provision of a continuous fluid flow.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Details And Applications Of Rotary Liquid Pumps (AREA)
• Rotary Pumps (AREA)
• Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
• Details Of Reciprocating Pumps (AREA)
• Arrangement And Driving Of Transmission Devices (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7921032

Family Applications (1)

Country Status (6)

Families Citing this family (18)

Citations (6)

Family Cites Families (6)

• 1999
  • 1999-09-07 DE DE19942567A patent/DE19942567A1/de not_active Withdrawn
• 2000
  • 2000-09-05 US US10/069,392 patent/US6786709B1/en not_active Expired - Fee Related
  • 2000-09-05 DE DE50004267T patent/DE50004267D1/de not_active Expired - Lifetime
  • 2000-09-05 AT AT00962440T patent/ATE253175T1/de not_active IP Right Cessation
  • 2000-09-05 EP EP00962440A patent/EP1210519B1/de not_active Expired - Lifetime
  • 2000-09-05 JP JP2001521902A patent/JP4455796B2/ja not_active Expired - Fee Related
  • 2000-09-05 WO PCT/EP2000/008643 patent/WO2001018397A1/de not_active Ceased

Patent Citations (6)

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