CN100430149C

CN100430149C - Spraying bowl, rotary sprayer incorporating such a bowl and spraying installation incorporating such a sprayer

Info

Publication number: CN100430149C
Application number: CNB2005800039142A
Authority: CN
Inventors: 卡里尔·托梅; 帕特里克·巴吕; 埃里克·普鲁斯; 洛朗特·吉劳德
Original assignee: Sames SA
Current assignee: The company Sam
Priority date: 2004-02-06
Filing date: 2005-02-04
Publication date: 2008-11-05
Anticipated expiration: 2025-02-04
Also published as: CN1913972A

Abstract

The bowl is provided with first magnetic coupling means (4) which can cooperate with additional second magnetic coupling means (52-54) which are fixed on a non-rotary part (5) of a projector, said first (4) and second (52-54) coupling means exerting an at least partially axial effort (F3) resulting in rotational coupling of the bowl (3) to a corresponding drive element (11). The radial width (l42) of an annular or sectional surface (S42) defined by the first coupling means (4) is greater than the total radial width (l'52) of the coupling means (52-54) borne by the non-rotary part (5).

Description

Spraying bowl, the rotary jet that comprises described bowl and the spraying system that comprises described injector

Technical field

The present invention relates to a kind of spraying bowl that is used for the rotary jet of spraying and applying product.The invention still further relates to a kind of coating product injector that comprises such bowl and a kind of system that is used to combine the spraying and applying product of such injector.

Background technology

In coating product spraying system, known by providing the coating product and coming the spraying and applying product with the spinner member of the rotation of the speed between 2,000 to 120,000 rev/mins usually, this spinner member is called bowl or dish.With the speed of being discussed, this bowl must be as far as possible light and balance so that avoid unbalance as far as possible, especially comprise under the situation of air and/or magnetic bearing turbine being used to rotate device driven.

For example known from WO-A-94/12286, by the installing ring that can be radially expanded bowl is connected to rotor.For example also known from WO-A-01/62396, use magnetic coupling device between the rotor of bowl and turbine.These magnetic coupling devices comprise permanent magnet, and this permanent magnet assembles comparatively complexity on described bowl or on the described turbine rotor, especially for fear of the explosion under action of centrifugal force of these magnets.Such assembling often hinders the rapid replacing of magnetic coupling magnet.In addition, the balance of rotating part must be desirable as far as possible, so that the effect of limit centrifugal force.Therefore, employed this or each magnet must keep balance in rotation, and this is difficult for realizing that this is not have isotropic density because form the material of magnet, and because such material is frangible, is difficult to machined thus.

Summary of the invention

Specific purposes of the present invention are, overcome these defectives by a kind of spraying bowl is provided, and this spraying bowl can easily be driven by the rotor that is arranged at its end owing to effective magnetic coupling, and need not to assemble permanent magnet on the rotating part of injector.

In such thinking, the present invention relates to a kind of spraying bowl that is used for the rotary jet of spraying and applying product, it is characterized in that, this spraying bowl is equipped with first magnetic coupling device, this first magnetic coupling device is suitable for matching with the second complementary magnetic coupling device on the non-rotating part that is fixed on this injector, this first magnetic coupling device and the second complementary magnetic coupling device are suitable for being applied to the axial power of small part with respect to the rotation of this bowl, and this is made every effort to promote makes this bowl and corresponding driving element rotation coupling.

Because the present invention, the power that is produced by described magnetic coupling makes and the rotor of the drive unit of described bowl and this bowl-specifically be turbine can be connected, even the magnetic-coupled situation of appearance also is like this between the non-rotating part of the bowl of rotation and this injector.Therefore, can be set to described or each coupling magnet are installed on this non-rotating part, described magnet needn't keep balance under these circumstances.

But according to favourable non-imposed aspect, spraying bowl can be in conjunction with one or more following features:

-be arranged so that by the magnetic coupling device of described bowl supporting bonding force is a substantial axial.

-convex part, be truncated cone shape on its appearance integral, be suitable for joining in the central housing, this central authorities' housing has the correspondingly-shaped that is formed in the element that is used for rotating driving, described bowl can be in rotation by adhering between above-mentioned convex part and the housing-promptly by axial force that magnetic coupling device produced-be connected with this element.In a kind of version, described bowl-type becomes the housing of truncated cone shape on the whole, and the male portion branch of the correspondingly-shaped that is fixed together with described driving element is set to be bonded in this housing, and since above-mentioned axial force can bowl be rotatably connected with driving element by adhesion.

-the first magnetic coupling device forms the surface of annular or truncated cone shape, and this surface limits the boundary of the air gap between the described magnetic coupling device, and radial width that should the surface is bigger than the whole radial width of the second complementary magnetic coupling device.Because it is in this respect of the present invention, magnetic coupling force in this air gap remains axially basically, being included under the situation of radial offset between the magnetic coupling device also is so, and this has been avoided magnetic coupling force applying contacted out-of-balance force between the rotating part that may cause injector and the non-rotating part on the described bowl.

The ring-type element that-the first magnetic coupling device is made by the magnetic material of installing or screwing around the main body of bowl constitutes, and forms the surface of annular or truncated cone shape, and this surface defines described air gap with the second complementary magnetic coupling device.

The invention still further relates to a kind of rotary jet of spraying and applying product, this rotary jet comprises bowl and is used for driving in rotation the element of this bowl, this injector is characterised in that, this injector also comprise be used for injector the bowl and non-rotating part between magnetic-coupled device, these devices are suitable for being applied to the axial power of small part with respect to the rotation of bowl, and this is made every effort to promote is coupled the aforementioned bowl and the rotation of element.

According to favourable but optional aspect, such injector can adopt the combination of any technical permission in conjunction with a plurality of features in the more or following feature:

-described magnetic coupling device is arranged so that the bonding force that is obtained is axial basically.

-aforesaid bowl and element are respectively arranged with the part that is used for rotating by adhesion the complementary shape of coupling.

-this magnetic coupling device comprise at least one with circular pattern around the rotation setting of bowl and be fixed on magnet on the non-rotating part, and have a surface of annular or truncated cone shape by the magnetic coupling device of bowl supporting, this surface defines the boundary by the air gap between the magnetic coupling device of this bowl supporting and this magnet, and radial width that should the surface is bigger than the radial width of this magnet.Since this aspect of the present invention and specifically when aforementioned surfaces is annular, magnetic coupling force basically retainer shaft to, comprise that annular interactive surfaces also is like this with respect to the situation of magnet radial offset.In this case, this surperficial mean radius can be set to be substantially equal to the mean radius of this magnet, and/or this magnet is arranged to by two nonmagnetic or have the material bodies of low permeability and inner and externally radially as the border, and the radial width of the magnet that the radial width of aforementioned surfaces increases than the radial width by these material bodies is big.Non magnetic or have the material bodies of low permeability can be by air, constitute by the annular ring of making based on the aluminium of alloy or at the annular ring that is filled with the adhesive that is used for fixing this magnet or each magnet in the body that holds that the non-rotating part with injector is fixed together.The radial width of each material bodies is preferably big than the air gap that is limited between aforementioned surfaces and the described magnet, preferably is three times in this air gap at least, and more preferably is five times in this air gap.In addition, aforementioned surfaces can be talked and be set to radially inwardly and outwards to give prominence to respect to described magnet and nonmagnetic substance body, make projection at least greater than the air gap between this surface and this magnet, preferably be three times in this air gap at least, and be more preferably five times of sizes of this air gap.

The part of-magnetic coupling device is integrated on the body that adds injector to and in the axially extended ring support.This aspect of the present invention makes that can be existing turbine is equipped with the ring support of being discussed, and this makes the existing scalable one-tenth of injector according to injector of the present invention.

-those respectively and the air gap between the magnetic coupling device part that is fixed together of bowl and non-rotating part be to make these axial forces have the intensity of 50N to 200N.

-described bowl and/or driving element are provided with the gap that is used for assemble/disassemble, occur under the situation of dirt at the contact-making surface place between these elements, and this has been avoided the wedging of bowl on driving element.

Air stream is provided in-the air gap between magnetic coupling device, and this has been avoided build up of dirt in these air gaps, and such dirt is for example owing to come the solid of free bowl of coating product cloud that is sprayed or the arrival of liquid particles to produce.

At last, the present invention relates to a kind of system that is used for the spraying and applying product, this system comprises at least more than one described injector.Such system specifically, is easy for bowl being assemblied on the turbine and it being dismantled than the easier operation and maintenance of prior art system.

Description of drawings

With reference to accompanying drawing read following that only provide by way of example, comprise according to the description of two embodiment forms of the injector of bowl of the present invention, will be more readily understood the present invention, in the accompanying drawing:

Fig. 1 illustrates the longitudinal cross-section according to the coating product injector of first form of embodiment of the present invention, and this injector combines according to bowl of the present invention and constitutes a part according to system of the present invention;

Fig. 2 illustrates the view of details II of Fig. 1 of amplification.

Fig. 2 category-A is similar to Fig. 2, but the magnetic coupler element in the biasing structure only is shown, and has exaggerated this biasing in order more clearly to reflect this figure.

Fig. 3 illustrates the cross section that is similar to Fig. 1, and bowl is removed from the body of injector.

Fig. 4 shows injector with Fig. 1 to Fig. 3 and the stereogram of partly cutting open.

The variation of the schematically illustrated magnetic coupling force as the air gap function of Fig. 5, and

Fig. 6 illustrates the cross section that is similar to Fig. 2 of the injector and the bowl of second form according to the embodiment of the present invention.

The specific embodiment

Injector P shown in Fig. 1 to Fig. 4 supplies with the coating product from one or more source S, and for example passes through by double-head arrow F ₁The motion of shown perpendicular and with respect to the object O displacement to be sprayed of the I of the system that is positioned on opposite, so that these objects are sprayed.The air turbine that this injector P comprises front end 1 only is shown---promptly towards object O to be applied part---.The bowl 3 that this end 1 is rotated around the axis X-X ' of the rotor 11 of turbine by protective cover 2 encirclements and support.

Rotor 11 can be with the tens thousand of commentaries on classics of per minute---80000 rev/mins speed drive bowl 3 for example, thus spray along the direction of object O through the coating product that playpipe 18 comes from source S, as arrow F ₂Represented.

The unshowned favourable aspect according to the present invention, described injector P can be an electrostatic, promptly comprises being used for before or after edge 31 releases of bowl 3 this coating product being carried out the charged electrostatically device at the coating product.Illustrate as part in these figure, bowl 3 can be provided with otch 32.

The hub 33 that bowl 3 comprises two-piece type and formation dish also form the body 34 on surface 35, and described surface is used to apply flowing of product direction of 31 along the edge and distributes.Hub 33 is hollow and forms vertical passage 36 that when bowl 3 was installed on the rotor 11, this vertical passage was centered at the axis X that overlaps with axis X-X ' ₃-X ₃'.Described axis X ₃-X ₃' be the axis of symmetry of body 34, this body for example is made of titanium.

Install around body 34 by the ring 4 that the stainless ferromagnetic material of for example magnetic is made.This ring 4 be single type and comprise ring edge 41, this ring edge 41 is provided with internal thread, makes that can will encircle 4 by screwing is fixed on the external screw thread 37 of body 34.In a kind of version, ring 4 can be around firmly assembling of bowl 3.According to another version, this ring 4 can be a single type with body 34.

Ring 4 comprises that on the whole part 42 and this part 42 perpendicular to edge 41 has perpendicular to axis X ₃-X ₃' annular surface S ₄₂l ₄₂Presentation surface S ₄₂Radial width, this width is in axis X ₃-X ₃' the footpath upwards measure.

Body 34 is formed for penetrating the convex part 38 in the central housing 12 of rotor 11.The outer surface 38a of this part 38 be on the whole truncated cone shape and towards the back of bowl 3 (promptly back to the edge 31) assemble.The surperficial 12a of housing 12 also be truncated cone shape and along the directional divergence of the front 13 of rotor 11.α represents the semiapex angle of part 38 and β represents the semiapex angle of housing 12.Angle [alpha] and β are equal substantially, but this makes surperficial 38a and 12a surface engagement.Such surface engagement makes and can

element

11 and 3 be rotatably connected by adhesion.

According to version (not shown) of the present invention, bowl can be provided with the housing of the on the whole truncated cone shape similar to housing 12, and rotor is equipped with the truncated cone shape convex part that is similar to part 38 equally, and significantly, these elements also make and can pass through to adhere to and

Connection Element

11 and 3.

In part 38 wedging housings 12, surperficial 38a be used for body 34 is connected to surperficial S ₄₂The joint of surperficial 34b form the first gap 38b.Form with radial groove is provided with the second gap 12b in the bottom of housing 12.When bowl 3 is installed on the rotor 11, arrange

gap

38b and 12b on the opposite of the ora terminalis 38c of the inlet inclined-plane 12c of housing 12 and part 38 respectively.Dirt when these gaps have avoided part 38 to be wedged in the housing 12.

Body 15 surrounding rotors 11 of turbine and in fact constitute the stator of turbine.This body 15 can not rotatablely move.The support of being made by the stainless magnetic material of for example magnetic 5 is installed on the front 16 of body 15, and this support is provided with the center to be the annular groove 51 of axis X-X ' and toroidal magnet 52 is set in annular groove equally.Magnet 52 is remained in the appropriate location of groove 51 by two

adhesive layers

53 and 54, and these two adhesive layers radially extend on each side of these magnet 52 both sides.Thereby

adhesive layer

53 and 54 forms two roughly ringwise packing rings on each side that is arranged on this magnet 52.Considering can be based on the characteristic of the adhesive of epoxy resin gummed, and these packing rings are non magnetic.

Replace an independent magnet 52, a plurality of magnets can be arranged in the groove 51 and form a ring jointly.Described magnet or each magnet can be made by feeromagnetic metal or by the synthetic resin that loads the feeromagnetic metal particle, and wherein the feeromagnetic metal particle is injected to and makes these particles directed on the same general direction.

Replace

adhesive layer

53 and 54, can use nonmagnetic or have a metal of low permeability the packing ring of---particularly aluminium---.Equally, as long as magnet is fixed in the groove 51 the applicable material bodies that is full of air with other device.

l ₅₂The radial width of expression magnet 52.

l ₅₂And l ₅₄The radial width or the respective thickness of expression adhesive layer or

packing ring

53 and 54.

R ₅₂The mean radius of expression magnet 52.R ₄₂The mean radius of presentation surface 42.Radius R ₄₂And R ₅₂Basically equate that this is corresponding to the following fact, that is: when bowl 3 is installed on the rotor 11, surperficial S ₄₂Exposed surface S facing to magnet 52 ₅₂And it is medially disposed thereon.Therefore, seal again by the part 42 of ring 4 by the magnetic field that magnet 52 forms, conspicuous as the expression of the magnetic line of force L from Fig. 2.

This magnetic field makes and can encircle the X-X ' that parallel to the axis on 4---promptly axially apply directed force F ₃, and be used for bowl 3 is acted on rotor 11 securely, be about to surperficial 38a and act on the surperficial 12a.Because this active force, the surperficial 38a of contact is rotatably connected with 12a, and this makes bowl 3 to be driven by rotor 11.

It should be noted directed force F ₃Being parallel to the axis X-X ' in the plane of Fig. 2, all is like this in the arbitrary plane in the cross section that comprises axis X-X ', and this is because surperficial S ₄₂And S ₅₂Cause perpendicular to axis X-X '.

Because width l ₄₂Greater than width l ₅₂, and in fact greater than width in l ₅₂With width l ₅₃And l ₅₄Summation l ' ₅₂, the magnetic field that is caused by the biasing of magnet 52 is sealed again by the part 42 of ring 4, also is so even encircle 4 part 42 with respect to the skew of magnet 52 slight radial, as shown in Fig. 2 A.The axis X of bowl 3 when this figure is arranged on epitrochanterian appropriate location corresponding to bowl ₃-X ₃' situation about not aligning with the axis X-X ' of rotor 11.In that event, directed force F ₃Basically retainer shaft to, this can not cause the risk that bowl 3 radially moves with respect to rotor 11, mobile meeting like this causes

contact area

12 and 38 the damage between these parts or can cause laterally moving of rotor 11, this rotor laterally move the drive unit that can damage rotor self---the rotor fin under the gas-turbine situation for example.

As long as width l ₄₂With respect to width l ₅₂, l ₅₃And l ₅₄Has enough big value, radius R ₄₂And R ₅₂Needn't equate.

E presentation surface S ₅₂And S ₄₂Between the value of the air gap that produces.d ₁Presentation surface S ₄₂The distance outstanding with respect to layer 53 radial outward.d ₂Presentation surface S ₄₂The distance outstanding with respect to layer 54 radial inward.Overhang d ₁And d ₂Be different.But they can equate.Overhang d ₁And d ₂All greater than the value of air gap e.In fact, these overhangs are three times in air gap e and five times of sizes of this air gap preferably at least, and this provides power F ₃Good stability, being included in bowl 3, to take place under the situation that slight radial move with respect to rotor 11 also be like this.

In addition, thickness l ₅₃And l ₅₄Greater than air gap e, preferably be three times in this air gap at least.In fact, select to be substantially equal to five times thickness l of this air gap ₅₃And l ₅₄The magnetic line of force can be distributed well.

Shown in support 5 be fixed on by three screws 6 on the front 16 of body 15, the milling head 61 of these screws be bearing in the layer 53 on and can be bearing on the magnet 52, this helps magnetic coupling device 52 to 54 is fixed in the groove 51.---to be the direction of object O---axially forward extend body 15 to support 5.

Magnet

52 and 54 is integrated in the support 5 and makes can increase such support on the body 15 of conventional turbine machine, thus in this traditional turbine owing to be provided with therein and be provided with screw thread 17 among the centre bore 11a that manages 18 rotor 11 and make this bowl generally be fixed on the rotor 11 by screwing.In this way, support 5 is installed on the turbine and makes that can be wherein bowl being screwed in epitrochanterian conventional injector is transformed into according to injector of the present invention.This aspect of the present invention makes can conceive the upgrading existing equipment.

According to version (not shown) of the present invention,

magnetic coupling device

52,53 and 54 can directly be integrated on the body 15 and the support that need not add.

As can be more detailed visible in Fig. 5, power F ₃Basically the square value with air gap e is inversely proportional to.Air gap e is chosen as and makes capable F ₃Ratio is corresponding to the minimum of a value F of the 50N magnitude of the suitable confining force of bowl 3 on rotor 11 _3minGreatly.Air gap e also is chosen as and makes capable F ₃Maximum F less than the 200N magnitude _3max, and then this has been avoided bowl 3 to act on support 5 under the pressurization situation of the air bearing that does not have turbine and makes bowl and rotor to separate.In fact there is power F ₃Push rotor 11 danger of the left side of Fig. 1 to Fig. 3 to, this can have the effect that firmly fixes bowl 3.Therefore, be contemplated that the power F that obtains in the non-hatched area of intensity in Fig. 5 ₃In this zone, power F ₃Value be positioned at value F with respect to the variation ratio of the value of air gap e _3maxThe shadow region of top is medium and small.In this way, machining tolerance and build-up tolerance are to directed force F ₃Value do not have too much influence, perhaps at least than medium and small in above-mentioned shadow region.

In fact, select power F ₃Make it have the value that equals about 120N, this feasible value that can determine air gap e from the curve of Fig. 5.This value is can be at Fig. 5 visible and depend on value F _3minAnd F _3maxRegional Δ _eLast variation.In fact this value depends on the inertia of bowl, therefore depends on the physical dimension of bowl.It can be different as the function of used bowl type.

For fear of accumulating dirt between the apparent surface of the part 42 of magnet 52, air stream E is arranged in the air gap between these magnetic coupling devices.

In second form of embodiments of the present invention shown in Figure 6, has identical reference number with the element similar elements of first embodiment.Bowl 3 rings 4 that are equipped with on the body 34 that firmly is assemblied in this bowl in this embodiment.This ring 4 comprises ring-shaped edge 41 and frustoconical part 32, and this frustoconical part assembles towards the back of bowl 3 and the center is the axis X-X of this bowl '.The support 5 that is added on the turbine body of body 15 types of first embodiment is equipped with magnet 52, this magnet 52 by two packing rings of making by

nonmagnetic substance

53 and 54 as the border.Element 52 to 54 is arranged in the support 5, make its exposed surface be truncated cone shape and assemble and surperficial S with part 42 of face elements of equaling 52 to 54 towards the back of turbine ₄₂The semiapex angle γ of semiapex angle δ.S ₅₂The exposed surface of expression element 52.Therefore, surperficial S ₄₂And S ₅₂Be parallel and limit form the substantially invariable air gap e of thickness betwixt that this air gap also is the truncated cone shape with the semiapex angle that equals γ and δ.R ₄₂And R ₅₂Difference presentation surface S ₄₂And S ₅₂Mean radius, these mean radius equate basically.

When bowl 3 is positioned at appropriate location on the front end 1 of turbine, apply magnetic coupling force F ₃, this power is substantially perpendicular to surperficial S in the sectional plane of Fig. 6 ₄₂And S ₅₂Thereby, have the axial component of the X-X ' that parallels to the axis.For single power F around axis X-X ' ₃Make a concerted effort, it is axial basically.

l ₄₂The radial width of presentation surface 42.L ₅₂Same presentation surface S ₅₂Radial width, l ₅₃And l ₅₄

Representative ring

53 and 54 radial width.L ' ₅₂Expression width l ₅₂, l ₅₃And l ₅₄And.As in first embodiment, width l ₄₂Greater than width l ' ₅₂, the overhang d that surface 42 is radially outward and radially inwardly outstanding with respect to

ring

53 and 54 ₁Or d ₂, in fact this overhang is the quintuple level of the thickness of air gap e.

Magnetic line of force L is closed again by ring 4 part 42, and this guarantees bowl is remained on the appropriate location effectively with respect to the end 1 of turbine.

Bowl 3 is provided with convex part 38, and this convex partly is used for being contained in the housing that the rotor 11 by turbine forms, by adhering to the power that the is connected F that realizes ₃Effect under occur in part 38 outer truncated cone shape surperficial 38a and limit to form between the frusta-conical surface 12a by rotor 11 formed housings.

In this embodiment, air stream E also can be arranged among the air gap e, thereby has following very favourable part, i.e. the rotation of this bowl makes air " suction " effect outside this air gap in air gap e.

Claims

1. spraying bowl that is used for the rotary jet of spraying and applying product, it is characterized in that, it is equipped with first magnetic coupling device (4), this first magnetic coupling device (4) is suitable for and the non-rotating part (5 that is fixed on described injector (P), 15) the second complementary magnetic coupling device (52) on cooperates, and described first magnetic coupling device and the second complementary magnetic coupling device are suitable for being applied to the axial power (F of small part with respect to the rotation of described bowl (3) (X-X ') ₃), described making every effort to promote makes described bowl (3) rotate coupling together with corresponding driving element (11).

2. bowl according to claim 1 is characterized in that described first magnetic coupling device (4) is arranged so that described power (F ₃) be roughly axial.

3. require one of them described bowl according to aforesaid right, it is characterized in that, described bowl comprises convex part (38), the profile of this convex part is whole truncated cone shape (α), be suitable for being bonded in the central housing (12) of the correspondingly-shaped (β) that is formed in the described element (11), because described axial force (F ₃), described bowl (3) is suitable for being rotatably connected with described element by the adhesion between described convex part and the described housing.

4. bowl according to claim 1 and 2, it is characterized in that, described bowl is provided with the housing of truncated cone shape on the whole, this housing is suitable for holding the convex part of correspondingly-shaped, and be fixed together with described driving element, because axial force, described bowl is suitable for being rotatably connected with described element by the adhesion between described housing and the described male portion branch.

5. bowl according to claim 1 and 2 is characterized in that described first magnetic coupling device (4) forms annular or frusta-conical surface (S ₄₂), this surface limits the border of the air gap (e) between described first magnetic coupling device (4) and the second complementary magnetic coupling device (52 to 54), and the radial width on described surface greater than total radial width of the described second complementary magnetic coupling device (l ' ₅₂).

6. bowl according to claim 1 and 2, it is characterized in that, described first magnetic coupling device forms by the ring-type element of being made by magnetic material (4), and this ring-type element (4) installs and form the surface (S of annular or truncated cone shape around the main body (34) of described bowl (3) ₄₂), this surface limits air gap (e) with the described second complementary magnetic coupling device (52 to 54).

7. the rotary jet of spraying and applying product, the element that it comprises bowl and is used to drive this bowl rotation, it is characterized in that, this injector comprises the non-rotating part (5 that is used for described bowl (3) and described injector (P), 15) magnetic coupling device (4 between, 52 to 54), the rotation (X-X ') that is suitable for respect to described bowl of this device is applied to the axial power (F of small part ₃), described making every effort to promote makes described bowl (3) and described element (11) rotation coupling.

8. injector according to claim 7 is characterized in that, described magnetic coupling device (4,52 to 54) is arranged so that described bonding force (F ₃) be roughly axial.

9. according to claim 7 or 8 described injectors, it is characterized in that described bowl (3) and described element (11) are respectively arranged with to have complementary shape (38a, part 12a) (38,12) is used for rotating coupling by adhesion.

10. according to claim 7 or 8 described injectors, it is characterized in that, described magnetic coupling device comprises at least one magnet (52), described non-rotating part (5 is arranged and be fixed on to this magnet with circular pattern around the axis of described bowl (3) (X-X '), 15) on, and form the surface (S of annular or truncated cone shape by the magnetic coupling device (4) of described bowl supporting ₄₂), this surface limits the border by the air gap (e) between the magnetic coupling device (4) of described bowl and described magnetic body support, and the radial width (l on described surface ₄₂) greater than the radial width (l of described magnet ₅₂).

11. injector according to claim 10 is characterized in that, described surface (S ₄₂) mean radius (R ₄₂) be substantially equal to the mean radius (R of described magnet (52) ₅₂).

12. injector according to claim 10 is characterized in that, described magnet (52) or material bodies (53,54) with low permeability nonmagnetic by two is in inside and outside radially adjacency, and described surface (S ₄₂) radial width (l ₄₂) greater than radial width (l by described material bodies ₅₃, l ₅₄) radial width (l of the described magnet that increases ₅₂).

13. injector according to claim 12 is characterized in that, the radial width (l of each described material bodies (53,54) ₅₃, l ₅₄) all greater than described surface (S ₄₂) and described magnet (52) between air gap (e).

14. injector according to claim 12 is characterized in that, the radial width (l of each described material bodies (53,54) ₅₃, l ₅₄) be three times in described surface (S at least ₄₂) and described magnet (52) between air gap (e).

15. injector according to claim 12 is characterized in that, the radial width (l of each described material bodies (53,54) ₅₃, l ₅₄) be described surface (S ₄₂) and described magnet (52) between five times of sizes of air gap (e).

16. injector according to claim 12 is characterized in that, described surface (S ₄₂) radially inwardly or outwards give prominence to its overhang (d with respect to described magnet (52) and described material bodies (53,54) ₁, d ₂) at least greater than the air gap (e) between described surface and the described magnet.

17. injector according to claim 12 is characterized in that, described surface (S ₄₂) radially inwardly or outwards give prominence to its overhang (d with respect to described magnet (52) and described material bodies (53,54) ₁, d ₂) be three times in the air gap (e) between described surface and the described magnet at least.

18. injector according to claim 12 is characterized in that, described surface (S ₄₂) radially inwardly or outwards give prominence to its overhang (d with respect to described magnet (52) and described material bodies (53,54) ₁, d ₂) be five times of sizes of the air gap (e) between described surface and the described magnet.

19. according to claim 7 or 8 described injectors, it is characterized in that, the part (52 to 54) of described magnetic coupling device (4,52 to 54) is integrated in the annular support (5), and the body (15) that this annular support is added in described injector (P) is gone up and extended axially.

20. according to claim 7 or 8 described injectors, it is characterized in that described magnetic coupling device (4,52 to 54) is individually fixed in those parts (4 of described bowl (3), 52) with described non-rotating part (5,15) between air gap (e) for making described axial power (F ₃) have 50 to the intensity of 200N.

21., it is characterized in that described bowl (3) is provided with the gap (38b) or the described driving element (11) that are used for assemble/disassemble and is provided with the gap (12b) that is used for assemble/disassemble according to claim 7 or 8 described injectors.

22., it is characterized in that described bowl (3) is provided with the gap (38b) and the described driving element (11) that are used for assemble/disassemble and is provided with the gap (12b) that is used for assemble/disassemble according to claim 7 or 8 described injectors.

23., it is characterized in that air stream (E) is provided in the air gap (e) between the described magnetic coupling device (4,52 to 54) according to claim 7 or 8 described injectors.

24. be used to spray the system of spray, it is characterized in that it comprises that at least one is according to the described injector of claim 7 to 23 (P).