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
  • 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
  • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
  • F04C2/086—Carter

Definitions

• Rotary displacement machine with at least two externally toothed feed gears and housing for such a machine
• the invention relates to a rotary displacement machine with at least two externally toothed feed gear wheels for conveying a fluid and with at least one feed channel with at least one feed opening in the region of the feed gear wheels for feeding the fluid to the feed gear wheels.
• the invention further relates to a housing for such a machine.
• Rotary displacement machines of the type in question here can be used both as
• Pumps i.e. as pressure generators, as well as motors, i.e. as pressure consumers, are used.
• the fluid conveyed is usually a hydraulic oil. If the machine is used as a pump, various fluids, but especially liquids such as oil, water and the like, can be pumped.
• the externally toothed conveyor gearwheels can be both gearwheels in the classic sense and toothed rings, which are sometimes also referred to as gearwheel rings, or any other type of cylindrical body, on the outside of which a suitable toothing is provided.
• Such rotary displacement machines are known in various forms, e.g. from DE 195 33 215 A1 or DE 254 645 C1, each of which shows rotary displacement machines in the form of gear pumps with two feed gearwheels arranged in a housing, one of the feed gearwheels being driven in each case by a drive gearwheel arranged in the housing.
• BBl ⁇ riGUNGSKOPlE Conveyor gears are known in which one of the conveyor gears is driven via a shaft guided out of the housing.
• Turbulence and cavitation which limit the efficiency and the possible uses of the machines and which have the effect that the filling of the delivery chambers formed between the teeth of the delivery gearwheels is not optimal.
• the invention is based on the object
• a rotary displacement machine of the type mentioned at the outset in which at least two feed openings are provided and each feed opening is designed such that, when the circulation displacement machine is operated as intended, fluid escaping from the feed opening either only to the teeth of a single feed gear or only to the teeth
• a rotary displacement machine designed in this way has the great advantage that there are clear fluid flows during operation, while in the rotary displacement machines known from the above-mentioned publications, each of which has a clockwise and a counterclockwise rotating feed gear, the fluid after it emerges from a feed opening from both the right - Can also be detected by the left-turning feed gear, so that the fluid flow disturbing vortices and cavitation arise.
• the configuration according to the invention reduces filling losses and the fluid can
• Feed gears are fed so that the impulse transmitted by the flowing fluid to the feed gears does not unnecessarily brake the rotation of the feed gears.
• a rotary displacement machine designed according to the invention will have two intermeshing feed gears, with at least one feed opening then being assigned to each feed gear.
• the invention is therefore based on the basic idea that by appropriate
• feed channels are provided, and preferably as many as feed gears are provided.
• Each feed channel can then be provided with its own inlet so that such a machine can be operated simultaneously with fluid from different pressure sources when used as a motor and can draw fluid from different reservoirs when used as a pump.
• the rotary displacement machine can then advantageously also serve as a mixer.
• the feed gears are in one
• At least one connecting channel is provided in an advantageous development of the invention, which connects the combing area with at least one between the teeth a conveyor gear and the housing chamber formed directly or indirectly connects the housing.
• connection channels are sometimes also present in the combing area, but these are connected to the respective reservoir from which fluid is drawn off, so that the pressure generated in the combing area is used in the previously known machines to convey the fluid there where you actually want to vacuum it.
• connection channel or channels can be connected via corresponding lines or directly to one or more delivery chambers. It is particularly advantageous to form the connection channel (s) by appropriate shaping of the housing, in particular by the fact that the
• Conveyor gears surrounding the inside of the housing one or more grooves are introduced.
• the conveyor gearwheels are designed in the form of toothed rings. This has a number of advantages. Material can be saved and the weight of the machine can be reduced.
• the toothed rings can be stored in a particularly simple manner, and the rotating shafts required for gear wheels can be omitted. Depending on the size and design of the gear rings, one bearing per gear ring can suffice, while rotating shafts must always be supported at both ends.
• Rotary displacement machine as a motor would have to be referred to as a "driven gear”, but for reasons of clarity is only referred to below as a drive gear).
• the transmission ratio between the drive gear and the driven (driven) feed gear is greater than 1: 3 and is in particular between 1: 4.5 and 1: 6.5. This not only reduces the torque to be applied in the case of use as a pump, it has also been shown that such a transmission ratio advantageously contributes to reducing the running noise.
• FIG. 1 shows a schematic cross section through a rotary displacement machine according to the invention with two feed gearwheels and one drive gearwheel,
• Fig. 2 is a schematic representation of a part of a housing according to the invention for a rotary displacement machine with two feed gears and
• Fig. 3 shows a schematic cross section through a rotary displacement machine with two intermeshing Feed gears with two connecting channels connecting the combing area, each with a feed chamber.
• FIG. 1 shows a rotary displacement machine, designated in its entirety by 10, in which two feed gear wheels, here designed as feed tooth rings 12 and 14, are arranged in a housing 16 in such a way that they mesh with one another in one area.
• the conveyor toothed rings are each rotatably mounted about a fixed axis 18 or 20.
• a drive is used to drive or drive the feed gears
• Drive gear 30 is provided, which meshes the conveyor toothed ring 12 and has an approximately six times smaller diameter than the same 12.
• the drive gear 26 is arranged in the housing 16 between the conveyor toothed rings 12 and 14 in such a way that it is encapsulated against inflowing fluid.
• two separate feed channels 32 and 34 are provided for the supply of fluid, the feed channel 32 being assigned to the feed toothed ring 12 and the feed channel 34 being assigned to the feed toothed ring 14 and in each case forming only one feed opening.
• Connections known per se and therefore not shown here for the introduction of fluid into the feed channels 32 and 34 are provided on the outside of the housing 16.
• An outlet 36 is provided to discharge the delivered fluid. Via the feed openings of the feed channels 32 and 34, fluid to be pumped during operation of the rotary displacement machine enters the feed chambers formed between the teeth of the feed toothed rings 12 and 14 and is - in this exemplary embodiment after approximately three-quarter turn of the respective feed toothed ring - expelled via the outlet 36. Possibly not expelled
• Residual quantities of the fluid conveyed which, depending on the design of the machine, may still be present between the teeth of the conveyor toothed ring 12 after passing through the area in which the feed toothed rings mesh, can reach the drive gear 30 and advantageously for lubricating the meshing area of the feed toothed ring 12 and the drive gear 30 contribute.
• FIG. 2 shows a section of a housing 40 for a rotary displacement machine, in which, as indicated by the dashed lines 42 and 44, two supply channels for supplying fluid to be conveyed are formed.
• the feed channels have a common inlet 46, but open into two separate areas 48 and 50 of the housing, which serve to receive a feed gear or feed ring.
• An outlet 52 for discharging conveyed fluids is also provided in the housing.
• FIG. 3 shows a schematic cross section through a rotary displacement machine, designated in its entirety by 60, with two intermeshing feed gears 62 and 64.
• the feed gears are arranged in a housing 66 in which two feed channels 70 and 72 connected to a common inlet 68 are formed, wherein the feed channel 70 opens on the conveyor gear 62 and the feed channel 72 opens on the conveyor gear 64.
• the housing also has an outlet 74.
• the special feature of this exemplary embodiment according to the invention is represented by the dotted arrows 76, 78, 80 and 82, which each show the fluid flow made possible by connecting channels from the combing area in which the feed gearwheels 62 and 64 mesh with one another, to an area at which the between the housing inner wall and the teeth of each feed gear Swipe the funding chambers, hint.
• the connecting channels can be implemented inexpensively, for example, by grooves on the inside of the housing facing the feed gear wheels.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Rotary Pumps (AREA)
• Transmission Devices (AREA)
• Gear Transmission (AREA)
• Basic Packing Technique (AREA)
• Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
• Intermediate Stations On Conveyors (AREA)
• Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7919838

Family Applications (1)

Country Status (7)

Families Citing this family (10)

Family Cites Families (16)

• 1999
  • 1999-08-27 DE DE19940730A patent/DE19940730A1/de not_active Withdrawn
• 2000
  • 2000-08-28 WO PCT/DE2000/002927 patent/WO2001016489A2/fr active IP Right Grant
  • 2000-08-28 PL PL00353161A patent/PL353161A1/xx not_active Application Discontinuation
  • 2000-08-28 DE DE20014740U patent/DE20014740U1/de not_active Expired - Lifetime
  • 2000-08-28 DE DE50004747T patent/DE50004747D1/de not_active Expired - Fee Related
  • 2000-08-28 AU AU11284/01A patent/AU1128401A/en not_active Abandoned
  • 2000-08-28 US US10/069,843 patent/US6705847B1/en not_active Expired - Fee Related
  • 2000-08-28 EP EP00972568A patent/EP1212533B1/fr not_active Expired - Lifetime
  • 2000-08-28 AT AT00972568T patent/ATE256251T1/de not_active IP Right Cessation
  • 2000-08-28 DE DE10082587T patent/DE10082587D2/de not_active Expired - Fee Related

Non-Patent Citations (1)

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