DE1811668C3 - Dynamic fluid amplifier - Google Patents

Description

™ L

t _p

_{from the us} . _{PS 30} 01 539 a working according to _control p ^ p _Rinzi fluid known in which fluid through a J ^ _{of a} downstream

^ upstream point back ^. ^^ _{construction djent's}

^ _{Kführkanal the} establishment of an overpressure in the ^ J ™ _{by way of a} drain _{as a} controllable trained ^^ "uerkanals, _irken to a £ in this subregion WXSkungskammer Unteraer occurring _{For this reason, the} watch" | _{kanaJs as Stronneiler au bil} _

^ _Piece downstream from the Wechselmer into that output channel ge _{d F id} ^ß _{when the} control

leap. _In contrast, the object of the invention is one

3. Fluid amplifier according to claim 1 or z, 30 «6 type defined at the outset, such as

characterized in that described in the one or more flu ^ "dere in de US-PS 32 70 758

Return channels (24, 25) eme steaming chamber • each n ** ^ ^ _{external fluid and}

mer is arranged (26,27) "" · _Blindfolded ndenen disadvantages do not apply and the

variable constrictions are arranged.

«N ^ ^ ^^ _{ggenen downstream}

Point is returned to the main jet at an upstream point that the inlet of the return duct in the area of the outlet ducts and its outlet near the power jet nozzle opens into the interaction chamber and

that the interaction chamber is in connection with the environment exclusively via ventilation channels

55

additional fluid from the environment caused by the skin and the one chamber of action has, in which a power jet nozzle unJ ^ twa perpendicular to the jet direction at least a control nozzle open into and from the at least one outlet channel and at least one vent opening go out.

Fluid amplifiers of the type mentioned are known in various embodiments, which are shown in Allocate wall jet, free jet and turbulence amplifiers

A typical embodiment of a wall jet amplifier is described in FR-PS 12 83 184 and shown in FIG. A typical embodiment of a free jet amplifier is in the US-PS 70 758 and shown in FIG. 3. A turbulence amplifier was introduced by the CA-PS 19 506 known and is shown schematically in FIG

All of these types correspond to the fact that the area around the beam is largely achieved at the outset disconnected from the free environment, t w.rtI undI das M. tearing of fluid proceeds in an orderly manner. The goal a good insulation and a small volume have become a tightly enclosed Interaction chamber with current conductors and Channels led, which enables a significantly increased Mmiatunsierung.

Preferred refinements are set out in the subclaims contain. ". · ,, ··

^{In order} to ^enable adjustment of the Ruckstromung ^ute 8, it may be advantageous in one or more of the feedback ^ - and / or Entluftungskanäle arranging fixed or variable by adjustment confusions that cause Drosselw.rkung.

The invention is now based on the drawings explained.

Fig. 1 shows a conventional wall jet amplifier with removed cover plate;

18th

F i g. 2 shows an improved wall jet amplifier according to the invention with the cover plate removed;

F i g. 3 shows a conventional free jet amplifier with cover plate removed;

F i g. 4 shows an improved free jet amplifier according to the invention with the cover plate removed;

Fig. 5 shows a conventional turbulence enhancer in a schematic representation;

F i g. 6 shows a turbulence intensifier improved according to the invention without a cover plate;

F i g. 7 shows a cross section along the line VII-VII of the FIG. 6 amplifier shown.

In the drawings, the corresponding elements of the amplifier nr *. same reference numerals Mistake.

The wall jet amplifier with OR / NOR function shown in FIG. 1 has an inlet channel designed as a power jet nozzle 1 for primary ao res fluid, two control channels designed as control nozzles 2 and 2 ', a suction duct 3 for suction of entrained secondary fluid from the environment, one interaction chamber 4, two Ventilation channels 5 and 6 and two outlet channels 7 and 8, respectively.

As a result of the suction of fluid by the power jet 11 via the suction channel 3, the Asymmetrical entrainment, as a result of which the power beam 11 mainly bends towards the side 9 becomes, which is the case when the control nozzles 2 or 2 'carry no signal.

As long as the nozzles 2 and 2 'do not carry a signal, the power jet 11 will try to remove fluid from the To entrain the environment, which he does by sucking in fluid through the channel 3 and possibly also reached through channels 5 and 6. By choosing a suitable pressure in the interaction chamber 4 it can be achieved that only venting takes place through the channels 5 and 6. To maintain the logic function, however, it is necessary that it is sucked in via channel 3. But because of this dirt, such as dust particles, can be carried away from the environment, leading to a Malfunction of the amplifier system.

In the embodiment according to the invention, the dust problem is avoided by as far as possible Encapsulation of the interaction chamber and avoidance of suction openings, soft connect the interaction chamber with the environment, as well as through that of the environment existing vents. The application of the embodiment of the invention to a Wall jet amplifier is shown in FIG. 2 shown.

The side of the power beam 11 facing the wall 12 can only be used in the vicinity of the opening 15 Entrain fluid via a return channel 13. The wall 12 of the flow guide 14 covers

668 (J.

* 7

takes on the function of the wall 10 in Fig. 1, which is a wall-jet amplifier of conventional design. The channel 6 is connected to the return channel 13 connected.

The in F i g. The conventional free jet amplifier shown in FIG. 3 is very much due to its open construction sensitive to disturbances from the environment, and also apply to him in terms of pollution the same disadvantages as with the wall-mounted jet amplifier already described. the Application of the invention to the free jet amplifier of FIG. 3 is in FIG. 4 shown.

The interaction chamber 4 is encapsulated here. The arrangement of flow guides 17 and 18 return channels 24 and 25 are formed, which are connected to the environment via ventilation channels 19 and 20, respectively are connected. To avoid wall effects, the compensation channels 21 and 22 in the flow guides 17 and 18 arranged.

The in F i g. 5 shown turbulence amplifier of conventional design has the disadvantage of a disordered Return. To avoid disturbances of the power beam by freely circulating Fluids that cause a reduction in stability, a sufficiently good encapsulation is required. The application of the invention to the turbulence amplifier offers the possibility of meeting today's requirements in terms of miniaturization.

In the flat embodiment of the turbulence intensifier according to the invention in FIGS 6 and 7 is the interaction chamber 4 with Flow guides 17 and 18 are provided, in which compensation channels 21 and 22 are provided. the Interaction chamber 4 also has ventilation channels 19 and 20 which connect to the return channels 25 and 24 are connected, which in turn were created by the flow guides 17 and 18, respectively. In the return channels 24 and 25 are arranged damping chambers 26 and 27, which for a ensure reassured repatriation.

In one or more of the return and / or the ventilation channels, for example adjustable throttles implemented by screws can be provided, which change the behavior of the amplifier allow optimal setting in a certain operating mode. The in the F i g. 6 and 7 amplifier shown are shown on a scale of 5: 1.

When using air at room temperature as the fluid and at a feed pressure of 150 mm The following data were measured in the water column:

Feed current Q _v ä; 16.5 liters / hour

max. outlet pressure .. p ₀ c ^ - 85 mm WS
max. output current .. Q ₀ «13 liters / hour

Control pressure ps «25 mm WS

"Fan out" factor F as 6

Switching time τ «1.5 milliseconds

For this purpose 2 sheets of drawings

Claims (2)

Claims: α Ar 1. Dynamic fluid amplifier whose λγ In some cases, the entrainment of additional time from the environment by the main jet Dedingt and which has an interaction chamber into which a power jet nozzle and at least one control nozzle open approximately perpendicular to its jet direction and from which at least one outlet channel and at least one ventilation opening emanate, characterized in that the necessary fluid replenishment is carried out via a guide channel (13, 24, 2S) on the palate, with which fluid from a downstream FunKt oem Main jet (11) is fed back at an upstream point that the inlet of the return channel in the area of the output channels (7, 8) and its outlet near the Le.- jet nozzle (15) * & * £ * $ ££ & ■ chamber (4) and that the reversing chamber is only connected to the environment via ventilation ducts (5, 6; 19, 20). 2. Fluid booster according to claim 1, characterized defined basic principle and cause certain difficulties. Thus, it is to maintain the wipe function necessary that the principal ray of additional fluid can suck from the environment, to adhere ^. ^ _{To benac} hbarten walls, which ο _Gefa LN brings a _mutxung externally registered encryption by dust particles with it. The ^ _{o +} k _{e manoeuvrable} it the supply of supplementary fluid 'jj ^ _verbundeneE disadvantages increase with "" _{Dim hmender} ension of the device rapidly to _have a real practical miniaturization