DE3045677A1 - Spin control for ventilators - has adjusting ring as bearing block for journals with blade adjusting levers - Google Patents

Abstract

The spin control has axial flow, and is for blowers, ventilators etc. It has guide blades, held via bearing journals in a ring, e.g. the inlet nozzle of a radial blower, and in a housing surrounding the rotor shaft. An adjusting ring is rotatably held on the housing, and the inner bearing journals of the guide blades each engage with the ring via an adjusting lever. The adjusting ring (13) projects coaxially into the housing, at a distance to its inner circumference. It forms a bearing block for journals (24), which are freely turnable about radial axis. Each journal has an adjusting lever (25) directed radially to its axis. The inner bearing journal (10) of each guide blade (3) has a fork slot (26) into which engages the adjusting lever.

Description

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Heinrich Nickel GmbH., Ventilation and air conditioning technology, Siegstrasse 16, 5240 Be t ζ d ο r f / Sieg,

Swirl regulator for fans, blowers or the like.

The invention relates to a swirl regulator with axial flow for ventilators, blowers or the like Welcnea Le it shovel around at least approximately radial Axes via bearing journals firmly connected to them at their outer ends in a jacket ring, for example in the inlet nozzle of a radial fan, and on theirs inner ends are mounted in a housing surrounding the drive shaft of the rotor, and in which coaxially an adjusting ring is rotatably held on the housing, with which the inner bearing journals of all guide vanes are in actuation engagement via one adjusting lever each,

Swirl controls of this type have long been used, e.g. through the GB-PS 496 01? and GB-PS 508 284 are known.

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They are used to adapt the fan performance to the different Volume flow and pressure requirements, for example in ventilation systems, and are mainly brought into use when throttle controllers work too lossy or speed controllers for the drive motor are too expensive.

Compared to swirl regulators with external adjustment of the guide vanes, for example by DE-AS 22 50 559 and DE-OS 24 26 824 are also known the generic swirl regulator with internal adjustment the le it scoop up the advantage of being with one Realize less technical effort and can be built so small that their installation cross-section is not larger than the installation cross-section for the rotor shaft bearings. Yes, there is even a case of need the possibility of the guide vane adjustment device and to summarize the rotor shaft bearings structurally, such as which can be seen from GB-PS 496 OI7.

It is advantageous for the inner guide vane adjustment but also that they can be used in one and the same embodiment for vane regulators of different outer diameters can be used, provided the inside diameter of their housing offers a sufficiently large passage for different rotor shaft diameters.

ORIGINAL INSPECTED

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Finally, it turns out to be the case with the inner guide vane adjustment But it is also advantageous that the entire mechanism is secured against contamination can be encapsulated in the housing (GB-PS 508 284) and therefore works practically maintenance-free.

With all known swirl regulators with internal adjustment of the guide vanes, the adjustment mechanism essentially consists of the inner guide vane bearing journals attached, In general, adjusting levers directed at right angles to their axes and one rotatable in the housing mounted adjusting ring, the adjusting ring in the circumferential direction Has evenly distributed, axially-radially extending guide surfaces into which the free Inden of the individual control levers by means of cylindrical or spherical heads intervene.

Apart from the fact that the assembly of the adjustment mechanism is made more difficult by this configuration, because the guide vane bearing journals provided with the adjusting levers can only be inserted into the housing from the inside to the outside and only then connected to the guide vanes can be, it also proves to be disadvantageous that the. free ends of each lever with thickened Heads ilen have to be provided in order to ia interaction with the adjusting ring which is necessary for the twist control To enable adjustment angle.

ORIGINAL INSPECTED - 4 -

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Eventually, however, it can prove to be problematic prove if - especially in confined spaces - for the adjustment ring inside the housing a sufficiently large storage area must be created and an axial position security is also required that is independent of an adjacent rotor shaft bearing is effective.

The aim of the invention is to create a swirl regulator of the type specified in more detail at the beginning, which easy with appropriately simple design and can be safely assembled or disassembled; which works continuously smoothly and largely maintenance-free and can also be used regardless of whether there is a rotor shaft bearing of the fan or blower is in its immediate vicinity or not.

A swirl regulator, which takes these requirements into account in an optimal way, is according to the invention by the specified in the characterizing part of the first claim Features realized.

In addition to the advantages resulting from the solution of the task at hand, there is also the possibility required, the entire adjustment mechanism located inside the housing directly through the adjustment ring shield against the rotor shaft.

L INSPECTED

I am an important further training feature for an inventive Swirl regulator, which in addition to a good storage of the adjustment ring an immediate closure of the one The end of the housing is shown in the second claim.

The measures specified in claim 3 enable a simple plug-in assembly for the entire adjustment mechanism
of the swirl regulator in the housing, while through
the proposed with claim 4 embodiment, the proper operative connection of the adjusting lever with the inner bearing pin of the guide vanes is secured.

The characterizing features of the fifth claim are useful for proper actuation, securing the position and limiting the angle of rotation of the adjusting ring, while ensuring simple assembly and disassembly.

The measures proposed in claim 6 can also serve the same purpose, using the advantage that if the bolts are not yet fully screwed into the housing, a rotation lock of the adjusting ring against the housing is obtained
functionally reliable merging of the control levers with the
Slitting the clevis pins made easier.

A good storage of the adjustment ring on the housing can
while maintaining the ease of assembly
the adjustment mechanism by the features of claim 7

reach. ORIGINAL INSPECTED

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The assignment of the adjustment mechanism combined in the housing according to the invention, the invention becomes swirl regulators for different jacket ring or inlet nozzle diameters substantially facilitated by the measures according to claim 8.

After all, it is different for the assembly Shell rings or inlet nozzles with inventive Swirl regulators are also important to use the features of the ninth claim, because they have different couplings long guide vanes with the adjustment mechanism make it much easier.

Other features and advantages of the invention are set out below explained in detail using a drawing. Here shows

Fig. 1 is the rear view of a swirl regulator for fans or blower,

FIG. 2 shows a section through the swirl regulator according to FIG. 1 along the line II - II,

Fig. 3 is a section through the swirl regulator along the Line III - III in Fig. 2 and

Fig. 4- a section through Fig. 3 along the line IV - IV.

In Figs. 1 and 2, a swirl regulator 1 for axial flow is shown, which is installed in the inlet nozzle 2 e.g. for a radial fan.

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The swirl regulator 1 has a larger number of guide vanes 3, each of which is mounted on the one hand in the inlet nozzle 2 and on the other hand in a housing 6 coaxially surrounding the rotor shaft 5 of the radial fan so that it can be rotated to a limited extent around an at least approximately radial axis M-.

The outer bearing pin 7 ″ of each guide vane 3 is included releasably screwed into a socket 8 on the inlet nozzle 2 and engages in a sleeve 9 attached to the outer end of the guide vane 3. In contrast, the inner journal is 10 of each guide vane 3 is connected directly to its inner end and from the outside into a radial bore 11 of the housing 6 inserted.

For the coaxial alignment and holding of the housing 6 in the inlet nozzle 2, several, for example four, radial struts 12, the rodη preferably of thread can be formed and each on the runner-side η Attack the end of the inlet nozzle 2 and the housing 6. Exclusively through these radial struts 12 is thereby the functionally correct position assignment of the swirl regulator 1 brought about the inlet nozzle 2.

The entire adjustment mechanism for all guide vanes of the swirl regulator 1 is arranged evenly distributed within the housing 6 and around the circumference of the rotor shaft 5 t.

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The adjustment mechanism has an adjustment ring 13 which at a distance from the inner circumference of the housing 6 protrudes coaxially into the latter and has a collar 14 on one thread, which consists of a radial planar part 15 and a sleeve part 16 connected to it in one piece. The collar 14 engages around the housing 6 from one end and forms the rotary bearing for the adjusting ring 1j5. on the outer circumference of the housing 6.

For fixing the position and limiting the angle of rotation of the adjustment ring 13 relative to the housing 6, the sleeve part 16 of the collar 14 can have elongated holes running in the circumferential direction 17 be provided, engage in the guide pins 18 which engage in thread 19 which radially into the wall of the Housing 6 are incised »

But it is also possible to form grooves 21 of limited length in the circumference of a collar 20 of the adjusting ring 13, in which then the guide pins 18 ax their inwardly directed ends can be screwed. In In this case, it is then possible, the sleeve part 16 of the collar 14 with axially parallel to the adjusting ring 13, To provide slots 22 open at one end, which when the adjusting ring 13 is pushed into the housing 6 as a twist lock and guideways with the Guide pins 18 interact and thereby the opposite

side engagement of the adjustment mechanism for the individual guide vanes 3 parts make it easier. Is the Engaging connection established, then the guide pins 18 can be screwed into the thread 19 until their outer bands are flush with the outer circumference of the housing 6 and their inner ends engage in the grooves 21. The anti-twist protection is then canceled and at the same time the adjusting ring 13 is axially fixed in the housing 6 and limits rotation angle lbe in the circumferential direction.

The adjusting ring 13 is in its length section adjoining the collar 20 with a larger number, for example eight bores 23, evenly distributed in the circumferential direction, are provided in each of these bores 23 is at one end 24- * a around a radial Axis freely rotatable pin 24 inserted, the other end 24 ″ a spherical, in particular spherical cap-shaped Has shape. The length of the pin 24 is dimensioned so that their spherical ends 24 ″ correspond to the inner circumference of the housing 6 are closely adjacent and prevent axial displacement of the pin 24 radially outward.

In each of the pins 24 an adjusting lever 25 directed radially to its axis is inserted and the inner bearing pin 10 Each guide vane 3 is provided with a fork slot 26 into which one of the adjusting levers 25 intervenes. The meshing connection between the actuating

lever 25 and the fork braids 26 of the inner bearing pin 10 of the guide vanes 3 i3t of the kind that an angular rotation of the adjusting ring 13 is a translated Angular rotation of the pin 24- with the adjusting levers and a corresponding angular rotation to the inner journal 10 of the guide vanes 3 forces, while the adjusting lever 25 at the same time an axial displacement movement and this superimposed angular movement run parallel to the axis of the bearing pin 10 in the fork oil slot 26. From an angular rotation of the Adjusting ring 13 between 45 ° and 60 ° can be a Angular rotation of the guide vanes of 90 ° can be derived.

An actuating lever is used to move the adjusting ring 13 27 »the one with the radial paddling part 15 of the collar 14 connected, for example screwed, is.

So that the adjusting ring 13 has a good guide on the outer circumference of the housing 6, the coaxial socket part 16 of the collar 14 can be given a length which is at least up to the common circumferential plane of all freely rotatable Pin 24 reaches. In order to then still easily install the pins 24 in the adjusting ring 13 to enable when the free end of the sleeve part 16 extends beyond this common circumferential plane, is the radial distance 28 between the inner circumference of the socket

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ORIGINAL fNSFECTED

partly 16 and the outer circumference of the adjusting ring 13 slightly larger than the total length of the pin 24 dimensioned

The protruding from the housing 6, thickened like a head Length section 29 of the inner bearing journals 10 for the guide vanes 3 is provided with a diametrical slot 30 provided, in which the inner end of the guide vanes 3 can be used. By a cross bolt 31 is then the guide vane 3 is connected to the bearing journal 10.

Finally it should be mentioned that the adjusting ring can obtain such an overall length which corresponds approximately to the length of the housing 6. Will he still be on its rear end is provided with a radial puddle 32, the outer circumference of which almost touches the inner surface of the housing 6 reaches, then the entire adjustment mechanism for the guide vanes 3 contamination-proof also against the rotor shaft 5 of the fan shielded ο

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Claims (1)

Heinrich Nickel GmbH., Ventilation and Air Conditioning Technology, Siegstrasse 16, 5240 Betzdorf / Sieg Claims M, 'Swirl regulator with axial flow for fans, Blower or the like, in which guide vanes by approximately radial axes via bearing journals firmly connected to them at their outer ends in a casing ring, for example in the inlet nozzle of a radial fan, and at their outer ends in one surrounding the rotor shaft Housing are mounted, and in which coaxially an adjusting ring is rotatably held on the housing, with the the inner bearing journals of all guide vanes are in actuation engagement via an adjusting lever each, characterized in that the adjusting ring (13) is at a distance from the inner circumference of the housing (6) protrudes coaxially into this and a bearing body for pins (24) that are freely rotatable about radial axes INSPECTED forms, each of which in turn has an adjusting lever (25) directed radially to its axis, and that the inner one Bearing pin (1O) of each guide vane (3) has a fork slot (26), in which one of the adjusting levers (25) engages. 2. Swirl regulator according to claim 1, characterized in that the adjusting ring (13) has one off a radial flange (15) and a coaxial Has sleeve part (16) existing collar (14) which the housing (6) of. one end encompasses as a pivot bearing. 3. Swirl regulator according to one of claims 1 and 2, characterized ge Ine t that the adjusting ring (13) is provided with evenly distributed in the circumferential direction arranged radial bores (23), in which the pin ^{engages with one end (24 1} ) rotatably , while you find another (24 ") has a spherical, in particular spherical cap-like, shape which is assigned to the inner circumference of the housing (6) as a support surface. 4. Swirl regulator according to one of claims 1 to ^ jdadur characterized in that the outer circumference of the Adjusting ring (13) comes close to the inner end of the bearing pin (10) for the guide vanes (3). 5. Swirl regulator according to one of claims 1 to 4, characterized ge mark ichne t that on radial flange part (15) of the collar (14) an actuating lever (27) is attached, while being coaxial The socket part (16) has slots (17) running in the circumferential direction into which bolts (18) anchored to the housing (6) for securing the axial position and limiting the angle of rotation for engage the adjusting ring (13). 6. Swirl regulator according to one of claims 1 to 4, characterized in that the coaxial socket part (16) of the collar (14) radial openings, in particular axial slots (22) open at one end, has that in the area of a collar (20) of the adjusting ring (13) lie that in the collar (2o) each running in the circumferential direction, extending over a certain arc angle extending grooves (21) are incorporated, and that through the openings of the socket part (16) bolts (18) can be screwed into threaded bores (19) of the housing (6) are that when their outer end is flush with the outer circumference of the housing (6) with their inner ends to secure the axial position and limit the angle of rotation in the grooves of the adjusting ring (13) engage. 7. Swirl regulator according to one of claims 1 to 6, thereby ge I denote that the sleeve part (16) of the collar (14) has a length which INSPECTED 30A5S77 Free at least up to the common perimeter level for all rotatable pin (24) reaches, and that the radial distance (28) between the inner circumference of the socket part (16) and the outer circumference of the adjusting ring (13) slightly is greater than the total length of the pin (24). β. Swirl regulator according to one of claims 1 to 7 » characterized in that on the On the rotor-side end of the housing (6) several, e.g. three or four, radial struts (12) can be fastened, for example can be screwed, by means of which the housing (6) on the casing ring or on the Sinlaufdüse (2) of the radial fan is attachable. 9 · Swirl regulator according to one of claims 1 to 8, characterized in that the inner End of the guide vanes (3) in a diametrical slot (30) of the bearing pin (10) is inserted and is fixed therein by a cross bolt (31). 10. Swirl regulator according to one of claims 1 to 9 » characterized in that the length of the adjusting ring (13) corresponds at least approximately to the length of the housing (6) and this at its rear End of a radial flange part (32) carries which at least approximately up to the Innenuafang of the housing (6) reaches. ORIGINAL / NSPECTED