阅读说明：本技术 转筒式离心机螺杆 (Rotational tubby centrifuge screw rod ) 是由 马提亚斯·谢德哈默 曼弗雷德·迈耶 于 2018-02-14 设计创作，主要内容包括：本发明涉及一种具有螺杆螺纹的转筒式离心机螺杆,其特征在于,螺杆螺纹设计成具有异型的螺纹横截面区域。(The present invention relates to a kind of rotational tubby centrifuge screw rod with screw flight, which is characterized in that screw flight is designed to special-shaped thread cross-section region.)

1. the rotational tubby centrifuge screw rod (10) that one kind has screw flight (22), which is characterized in that the screw flight (22) It is made up of special-shaped thread cross-section (52).

2. rotational tubby centrifuge screw rod according to claim 1, which is characterized in that the thread cross-section (52) is designed to With screw thread stabilizer blade (54), compared with thread neck part (56), the screw thread stabilizer blade (54) thickeies.

3. rotational tubby centrifuge screw rod according to claim 1 or 2, which is characterized in that in the transition for arriving screw rod hub (20) At portion (46), the thread cross-section (52) is designed to rounding, inclination or inclined-plane.

4. rotational tubby centrifuge screw rod according to any one of claim 1 to 3, which is characterized in that the screw thread is transversal Face (52) is designed to that, with screw thread stabilizer blade (54), the screw thread stabilizer blade (54), which has, is generally directed to two radial support webs (62,64) and the free space (66) between described two support webs (62,64).

5. rotational tubby centrifuge screw rod according to claim 4, which is characterized in that described two support webs (62,64) At least one of penetrated by least one access portal (68).

6. rotational tubby centrifuge screw rod according to claim 5, which is characterized in that at least one described access portal (68) It is made only in the support webs (64) deviated from the scraping side (70) of the screw flight (22).

7. rotational tubby centrifuge screw rod according to any one of claim 1 to 6, which is characterized in that the screw thread is transversal The first part (72) in face (52) extends in radial directions and the radial direction of second part (74) Xiang Suoshu screw rod (10) Inclination.

8. rotational tubby centrifuge screw rod according to any one of claim 1 to 7, which is characterized in that the screw thread is transversal At least one portion (78) in face (52) is bent in radial directions.

9. rotational tubby centrifuge screw rod according to any one of claim 1 to 8, which is characterized in that the screw thread is transversal Face (52) is designed to that with thread head (58), the thread head (58) thickeies compared with thread neck part (56).

10. one kind is used for the manufacturing method of rotational tubby centrifuge screw rod (10), wherein the rotational tubby centrifuge screw rod (10) Screw flight (22) is designed to special-shaped thread cross-section (52).

Technical field

The present invention relates to a kind of rotational tubby centrifuge screw rod with screw flight.The invention further relates to this drum-type from The manufacturing method of scheming screw rod.

Background technique

Known rotational tubby centrifuge screw rod includes rotating cylinder and the roller that is arranged therein.Rotational tubby centrifuge screw rod It is usually respectively provided with hollow cylinder or tubular screw rod hub, realizes screw flight on the screw rod hub.Screw flight usually extends To be wrapped in the metal plate on screw rod hub in outside.Therefore, metal plate is projected radially outwardly with approximate right angle, so that screw flight Almost in contact with the roller around it.

As the cylinder rotates, then the screw flight equally rotated immerses in roller in existing phase mixture.From mixing In object, screw flight conveys heavier or higher density the first phase radially outward separated respectively.It is lighter or lower close simultaneously Second phase of degree is radially-inwardly gathered respectively.Depending on application field, the first phase of weight generally comprises especially heavy solid, such as Soil, sand and stone.

Especially for this heavy granular solids, high revolving speed collective effect with roller, rotational tubby centrifuge screw rod On load be huge.

Summary of the invention

Basic task

It, can be under all modes of operation securely task of the invention lies in a kind of rotational tubby centrifuge screw rod is provided These loads are born, and at the same time can particularly economically manufacture.

Solution according to the present invention

According to the present invention, which is solved by the rotational tubby centrifuge screw rod with screw flight, the screw flight It is designed to have special-shaped thread cross-section.The invention further relates to a kind of manufacturing methods of rotational tubby centrifuge screw rod, wherein The screw flight of rotational tubby centrifuge screw rod is designed to special-shaped thread cross-section.

According to the present invention, screw flight is the screw rod of rotational tubby centrifuge screw rod, and being not designed to itself has constant thickness It spends and correspondingly observes the metal plate that rectangular winding is presented in cross-section.On the contrary, screw flight pointedly designs At having special-shaped thread cross-section, design cost is in the radial direction specially with different thickness.

There is special-shaped thread cross-section by being formed in this way, screw flight can be piecewise in a manner of targetedly Ground adapts to its static and dynamic load situation.Do so, can produce such screw flight: it is identical or it is even lower at Higher load is born in the case where this, and also with longer in the case where low material consumption and low production skill Service life.

Advantageous further exploitation of the invention

In advantageous further exploitation of the invention, thread cross-section is designed to there is such screw thread stabilizer blade: with spiral shell Line neck is compared, and screw thread stabilizer blade thickeies.The spiral shell that the screw thread stabilizer blade of thickening forms thread neck part and projects radially outwardly from the position The steady stability of line head connects.Therefore, thread neck part can be designed to thinner than conventional screw flight.By screw flight entirety It is designed to that it is more favorable for being radially outward tapered.

Preferably, in the transition part for arriving screw rod hub, thread cross-section is also devised to rounding, inclination or inclined-plane.From The transition part of screw rod hub to screw rod hub is designed as recessed and simultaneously at rounding in this way, reduces existing at this location Notch effect, and therefore increase static state and resistance to vibration at the position.Therefore, it is related preferably to pass through welding for screw flight Be directly connected to be connected to screw rod hub.

In another advantageous embodiment of the invention, thread cross-section is designed to there is such screw thread stabilizer blade: the screw thread There are two the support webs being oriented primarily radially and therebetween free spaces for stabilizer blade tool.Therefore, it sees in cross-section It examines, support webs are similar to form two legs, this leads to the more high stability of this screw flight arrangement.In addition, this arrangement can To be designed to that there is especially few material consumption.Meanwhile the integral arrangement of small quality is also along with relatively little of material.For whole The acceleration behavior of body arrangement, this is particularly advantageous.

At least one support webs is preferably penetrated by least one access portal.Access portal further reduces totality Quality.Access portal advantageously further can pass through and control fluid for clarifying the guidance of article in a manner of targetedly Guidance passes through.

At least one described access portal is preferably made only in the support webs deviated from the scraping side of screw flight In.The branch that the screw flight designed in this way then comprehensively designs on the scraping side of screw flight, while passing through cut Support web generates additional supporting element in the rear side of screw flight.The supporting element is that particularly lightweight or quality is small respectively simultaneously.

The first part of thread cross-section advantageously further extends in radial directions and second part is to screw rod Inclined.In terms of cross section, therefore this screw flight has in axial direction inclined thread head.Inclined screw thread Head can targetedly use, with will pass through screw flight realizes respectively be directed radially inward inside promotion conveying effect, or Scraping effect, or it is radially directed towards external pulling scraping effect.Therefore, the tilt angle or inclination angle of thread head and radial direction Preferably between 5 ° and 45 °, especially between 7 ° and 30 °.

Another advantageous embodiment according to the present invention, at least one portion of thread cross-section are designed in radial directions Bending.The cylinder with crooked cross section shape is formed, is being conveyed with the rotation axis of roller at a distance of certain radial distance It is deposited on the phase of the position forward of cylinder, targetedly to accumulate.In addition, this tin generates additional add in screw flight Use is pretended, otherwise screw thread is largely only radially outwardly aligned.

In addition, thread cross-section is advantageously designed as having on rotational tubby centrifuge screw rod according to the present invention and screw thread Neck is compared to the thread head thickeied.The thread head of thickening forms a kind of scraping edge, which there is additional reinforcement to imitate Fruit.Scraping edge is advantageously provided with wear-resistant coating.

In advantageous manner according to the present invention, screw flight according to the present invention is manufactured by molding built-up welding.In root According in advantageous manner of the invention, screw flight according to the present invention is by using activity, reactive welding gas or using lazy Property the welding that carries out of welding gas manufactured as molding built-up welding.This welding method is also referred to as MAG or MIG welding or using work Property gas or inert gas welding.Generally speaking, this method is referred to as protective gas metal arc welding (MSG).This welding Method is in 4063 standard of EN ISO: defining in process 135 and 131.

Moreover it is preferred that targetedly selecting the welding gas from certain subgroup welding gas according to the present invention.Root According to 14175 standard of DIN EN ISO, welding gas is divided into main group of I, M1, M2, M3, C, R, N, O and Z.From these main group of welding In gas, preferably only selection falls into main group of I, M1, the welding gas of M2 and N.According to the present invention, other welding gas are rejected intentionally Body, because these welding gas are not the target orientations for the solution according to the present invention as shown according to the present invention.

Main group of I includes having nominal 100 volume % argon gas (subgroup 1), nominal 100 volume % helium (subgroup 2) and nominally 0.5 to 95 volume % helium and remaining be argon gas (subgroup 3) welding gas.The welding gas is completely inert.

The subgroup 1 of main group of M1 includes the carbon dioxide with nominal 0.5 to 5.0 volume %, nominal 0.5 to 5.0 volume % Hydrogen, and remaining is the welding gas of argon gas or helium.The welding gas is slight oxidation, and only slight reproducibility 's.The subgroup 2 of main group of M1 includes the carbon dioxide with nominal 0.5 to 5.0 volume %, and remaining is the welding of argon gas or helium Gas.The welding gas is slight oxidation.The subgroup 3 of main group of M1 includes the oxygen with nominal 0.5 to 3.0 volume %, And remaining is argon gas or the welding gas of helium.The welding gas is equally slight oxidation.The subgroup 4 of main group of M1 includes tool There are the carbon dioxide of nominal 0.5 to 5.0 volume %, the oxygen of nominal 0.5 to 3.0 volume %, and remaining is argon gas or helium Welding gas.The welding gas is also slight oxidation.

The subgroup 0 of main group of M2 include have nominal 5.0 to 15.0 volume % carbon dioxide and remaining be argon gas or helium Welding gas.The welding gas is slight oxidation.The subgroup 1 of main group of M2 includes having nominal 15.0 to 25.0 volume % Carbon dioxide and remaining for argon gas or helium welding gas.The welding gas is equally slight oxidation.The son of main group of M2 Group 2 include have nominal 3.0 to 10.0 volume % oxygen device and remaining for argon gas or helium welding gas.The welding gas is still It is so slight oxidation.The subgroup 3 of main group of M2 includes the carbon dioxide with nominal 0.5 to 5.0 volume %, nominal 3.0 to The oxygen of 10.0 volume %, and remaining is argon gas or the welding gas of helium.The subgroup 4 of main group of M2 include have nominal 5.0 to The carbon dioxide of 15.0 volume %, the oxygen of nominal 0.5 to 3.0 volume %, and remaining is argon gas or the welding gas of helium.It is main The subgroup 5 of group M2 includes the carbon dioxide with nominal 5.0 to 15.0 volume %, the oxygen of nominal 3.0 to 10.0 volume %, and Remaining is argon gas or the welding gas of helium.The subgroup 6 of main group of M2 includes having the titanium dioxide of nominal 15.0 to 25.0 volume % Carbon, the oxygen of nominal 0.5 to 3.0 volume %, and remaining is argon gas or the welding gas of helium.The subgroup 7 of main group of M2 includes tool There are the carbon dioxide of nominal 15.0 to 25.0 volume %, the oxygen of nominal 3.0 to 10.0 volume %, and remaining is argon gas or helium Welding gas.The welding gas is also relatively light micro-oxygenation.

The subgroup 1 of main group of N includes the welding gas with the nitrogen of nominal 100 volume %.The subgroup 2 of main group of N includes tool There is the nitrogen of nominal 0.5 to 5.0 volume % and remaining is argon gas or the welding gas of helium.The subgroup 3 of main group of N includes having mark The nitrogen of 5.0 to 50.0 volume % and remaining be referred to as the welding gas of argon gas or helium.The subgroup 4 of main group of N includes having nominally The hydrogen of 0.5 to 1.0 volume %, the nitrogen of nominal 0.5 to 5.0 volume %, and remaining is argon gas or the welding gas of helium.It is main Group N subgroup 5 include have nominal 0.5 to 50.0 volume % hydrogen and remaining be nitrogen welding gas.These welding gas Body is all slow reaction, and the argon gas or helium for high-content are inert, and when hydrogen content increases only It is slight reproducibility.

In short, therefore targetedly selecting the weldering of inert, slight oxidation and/or slight reproducibility according to the present invention Connect gas.As shown according to the present invention, in the method for this molding built-up welding, suboxides weldering pearl and very big is can be used in people It works with there is no slag in degree.Therefore, weld seam or weldering pearl can be folded in a manner of particularly preferred positive lock and firm connection It adduction and is adhering to each other.In addition, people can be worked with express speed of welding, so as to shorten manufacturing time.Fast welding The real advantage of speed is that screw rod hub and coated weldering pearl are only slightly selectively heated during welding.Therefore, Only generate the distortion or deformation of very little.But special advantage according to the method for the present invention is, it is surprising that this heap welding Flank thus to manufacture has extra high wearability.

In advantageous further exploitation of the invention, welding gas includes a part nominally less than the dioxy of 20 volume % Change carbon.The carbon dioxide of this low content allows to process structural steel by pulse welding with advantageous manner according to the present invention.Together When, the relatively high burning of welding wire is also possible.This leads to high quality accumulation and especially quickly operation during welding.It is excellent Selection of land further uses the welding gas including a part of nominally oxygen less than 3 volume % as welding gas.This welding Gas has especially low oxidation effectiveness.In addition, include most of argon gas welding gas it is especially cheap.

It is particularly preferred that Shielding gas device according to the present invention is operated using pulsed arc.This pulse electricity Arc allows to accurately control the fusing of welding wire at Shielding gas device.Furthermore, it is possible to targetedly make to be input to work Heat in part keeps especially low, and can keep deforming as caused by temperature especially low.

The welding current of this pulse arc welding device preferably has base current less than 200 amperes and is greater than 200 amperes of pulse current.This welding current is advantageous in the particularly accurate material stacking of relatively low meltdown property. Thus use the welding gas of the carbon dioxide of argon gas and nominal 2 volume % with nominal 98 volume % as welding gas.

Further particularly advantageously, it is operated according to the present invention using the short electric arc that short electric arc, especially energy reduce Shielding gas device.This method using short electric arc is also referred to as cold arc, therefore, also referred to as uses especially cold electric arc Method.However, in order to realize strong fusing electric arc, in a particularly advantageous manner using the melt pulse of enhancing.

In an advantageous manner, the first welding layer is further formed as than the second welding slice width during built-up welding.This is especially Because Shielding gas device during coating the first welding layer than during coating at least one second welding layer with higher Welding current operate.Alternatively, for the first welding layer, welding can with mode of oscillation, with slower speed of welding or with Higher welding wire feeding rate carries out.Using such program, the first welding layer is implemented as having especially strong or a large amount of Coating.With smaller size smaller and therefore then, the first welding layer of this large volume is by relatively narrow the second welding layer is superimposed.Always It, manufactures circular base portion or bottom on the matrix of workpiece, and the matrix is with seldom notch effect and therefore with Gao Gang Property.

In a particularly advantageous manner, using a root wire or be advantageously used two root wires (double welding methods) operation protect Gas welder is protected, the diameter of the welding wire is 0.5mm to 3.0mm, it is therefore preferable to 1.0mm to 1.6mm., it is surprising that Exactly such gage of wire brings high speed of welding, while bringing especially low thermally-induced deformation.Particularly preferably The welding film or welding layer that individual width is 6 to 7mm.In particular, the welding of rectangular cross section is advantageous.

Preferably, during manufacturing metal works, the matrix of workpiece according to the present invention is moved.With movement, Mobile period of the workpiece at its welding position is directed, so that realizing optimum position for coated welding layer.It does so When, welding layer is coated to horizontal surface in a particularly preferred manner.Welding layer is coated to and is slightly risen in welding direction Surface is also advantageous.Inclination angle is preferably between 5 ° and 15 °, advantageously between 7 ° and 10 °.Matrix is correspondingly and favorably Ground is mobile, so that in the welding position of Shielding gas device there are horizontal welding surface or in the weldering of Shielding gas device Connect the welding surface slightly risen on direction.

In advantageous further exploitation of the invention, screw flight is designed to there is variation on the longitudinal direction of screw rod Screw pitch.The flight pitch of this variation, which allows to adjust material on the longitudinal direction of screw rod as needed, to be conveyed, especially heavy The speed of the conveying of phase.Small flight pitch improves the material conveying for the solid for being difficult to convey.It is according to the present invention advantageous The screw pitch of this variation can by molding built-up welding by especially quickly and it is simple in a manner of consumed with high changeability and low labour Mode manufacture.It is only necessary to be input to different screw pitch ranges in the data processing equipment of control automatic soldering device i.e. It can.

Correspondingly, according to the present invention, quickly, simply and cost-effectively manufacture screw flight can be advantageous by molding Built-up welding is designed as multi-coil screw thread.The helical curve or spiral that this multi-coil screw thread includes multiple congruences as screw thread, it Screw pitch offset relative to each other.It, can be under relatively small rotation by this screw flight with multi-coil screw thread Generate big axial movement.This permission realizes that especially quick material conveys on the longitudinal direction of screw flight.

According to the present invention, screw flight is preferably also provided with balance weight, which is equally made by molding built-up welding It makes.Using this balance weight, the non-uniform Mass Distribution at screw flight and at screw rod hub associated there can be compensated And Imbalance in weight.Each balance weight can be welded on screw flight in a manner of particularly accurate relative to positions and dimensions. Further, since the material coating of firm connection, the balance weight construction welded in this way is coated on screw rod spiral shell particularly stablely Line.Therefore balance expenditure greatly reduces.Especially under the high rotation speed during the operation of drum-type screw rod centrifuge, individually The accurate arrangement of this stabilization and part of balance weight has very big benefit.Otherwise thus caused uneven and vibration will lead to Cross the nearly all component of multiple load effect.

In advantageous further exploitation of the invention, screw flight is designed to have to be changed on the longitudinal direction of screw rod Screw pitch.The screw pitch of this variation allows to adjust the speed that material conveys on the longitudinal direction of screw rod as needed, especially The conveying speed of heavy phase.Small screw pitch provides the high-precision material conveying of per time unit.In addition, small screw pitch is especially in spy Not Chong material in the case where be advantageous because the application this material conveying needs corresponding lower power consumption.This is not only Can be to avoid the abrasion of screw flight, and the component of studdle can also substantially reduce abrasion.It is advantageous according to the present invention The screw pitch of this variation can by molding built-up welding by especially quickly and easily in a manner of consumed with high changeability and low labour To manufacture.In the data processing equipment for only needing for different spacing ranges to be input to control automatic soldering device.

Furthermore it is advantageous that screw flight has at least one access portal, the access portal complete penetration screw flight And it is equally manufactured by molding built-up welding.It is right that (evacuation) is discharged with the screw flight by not access portal Than, this access portal enable radially-inwardly existing lighter phase be significantly discharged faster and more energy efficiently.Do not having In the case where access portal, radially-inwardly existing light phase must be along all windings of screw flight against radially outward depositing Weight phase conveying direction outflow.Compared with the path that light phase must be covered when passing through at least one access portal, It is considerably long along the path of winding.According to the present invention, this access portal preferably can be in the molding built-up welding of screw flight Period is recessed in flank.Therefore, screw flight can be only in a work step with especially quick and cost-effective side Formula manufacture.

In addition, being formed on screw flight in advantageous manner according to the present invention with baffle, submergence disk or flotation dish type The disk with barriering effect of formula, the disk are equally manufactured by molding built-up welding.The disk manufactured in this way especially can be with Particularly stable, simple and cost-effective mode is installed on associated screw rod hub.In this case, there is barriering effect Disk be preferably mounted on the screw rod hub for being not provided with screw thread blade.It is particularly preferred that taking inventory with barriering effect At the conical section of screw rod hub, the phase of weight is only discharged behind the conical section in the discharge direction of the phase of weight.Therefore, have Diameter of the disk of barriering effect with its radial direction than roller inside terminates, and accordingly acts as preventing radially-inwardly existing lighter phase The baffle moved forward in the discharge direction of the phase of weight.

In addition, forming scraper on screw flight in advantageous manner according to the present invention, which equally passes through molding Built-up welding manufactures.It manufactures in this way, scraper, which equally especially has, cost-effectively to be manufactured, and especially steady during operation It is fixed.Exactly this scraper needs particularly stable and is able to bear high-tensile strength impact.Spiral shell in the discharge direction of phase for being located at weight The end regions of bar screw thread, scraper have the phase for wiping weight off from screw flight, the especially function of solid.

The invention further relates to a kind of manufacturing methods of rotational tubby centrifuge screw rod, wherein manufacturing screw rod by molding built-up welding Screw thread.

Detailed description of the invention

Hereinafter, the exemplary implementation of solution according to the present invention is explained in greater detail based on accompanying schematic figure Example.It is shown are as follows:

Fig. 1 is the first part of the longitudinal cross-section of rotational tubby centrifuge screw rod according to the present invention,

Fig. 2 be according to the second part of the longitudinal cross-section of Fig. 1,

Fig. 3 be according to the side view of the notch III of Fig. 1,

Fig. 4 be according to the enlarged drawing of the details IV of Fig. 1,

Fig. 5 is top view V according to fig. 2,

Fig. 6 is the variation example of details VI according to fig. 2,

Fig. 7 be according to the first variation example of the view VII of Fig. 5,

Fig. 8 be according to the second variation example of the view VII of Fig. 5,

Fig. 9 be according to the third variation example of the view VII of Fig. 5, and

Figure 10 is the 4th variation example according to the view VII of Fig. 5.

Specific embodiment

The screw rod 10 of drum-type screw rod centrifuge is shown in Fig. 1 to 10, in figure, as workpiece quilt mentioned herein Manufacture.Screw rod 10 includes the rotary shaft 12 for limiting axial direction 14 and radial direction 16.

Screw rod 10 is surrounded by roller 18, and for heavy along axial 14 discharge from the phase mixture (not shown) in roller 18 Phase.Screw rod 10 is designed to there is center bolt hub 20 and with the spiral-shaped screw flight 22 around center bolt hub 20.

Further it is provided that Shielding gas device 24 is manufactured by the Shielding gas device 24 with forming built-up welding Screw flight 22.For this purpose, the first welding layer 26 is coated on screw rod hub 20, then by Shielding gas device 24 by the Two welding layers 28 are coated to the first layer.In addition, coating other weldering in this way in top of each other or on top of each other Connect layer.Therefore, two-dimensional helical element or screw shaped surface have been manufactured, screw flight 22 is formed.

When in this way by molding built-up welding to manufacture screw flight 22 when, screw rod hub 20 be used as the first matrix and It is moved during manufacture.Screw rod hub 20 is rotated especially about its rotary shaft 12, and Shielding gas device 24 is simultaneously in axial direction Displacement in radial direction 16 and in this case gradually rise on direction 14.

Shielding gas device 24 is included welding wire 30 and is operated in MSG method using protective gas 32.Currently, protecting Shield gas 32 is selected from one of subgroup of main group of I, M1, M2 or N of 14175 standard of DIN EN ISO and is less than including nominal value Oxygen of the carbon dioxide and nominal value of this part of 20 percent volume less than this part of 3 percent volumes Gas.Electric arc 34 is generated by Shielding gas device 24 as a result, which is embodied as pulsed arc in the current situation.

Screw flight 22 can be particularly easy to and be achieved at low cost in this way, with low warpage and at the same time spy It is not wear-resisting.Particularly, multi-coil screw thread can also be manufactured in a simple manner.Screw flight 22 can also be designed to have in axis Variation and the screw pitch 36 therefore having different sizes on the longitudinal direction of direction 14 or screw rod 10.

By forming built-up welding, balance weight 38 can be further manufactured simultaneously on screw flight 22.By single solder joint and/ Or bigger welding material accumulation, balance weight 38 can be individually determined size and be accurately positioned.Therefore balance is greatly reduced Difficulty.

Screw flight 22 is also provided with various access portals 40 in a very simplified manner and without metal cutting process, Because it is manufactured by molding built-up welding.

Moreover, by molding built-up welding come manufacture has the disk 42 of barriering effect simultaneously on screw flight 22.Disk 42 can be with As baffle, but it is also used as submergence disk or flotation disk.

In addition, scraper 44 is molded on screw flight 22 also by the end regions that molding heap is welded in screw rod hub 20.

Transition part 46 from screw rod hub 20 to screw flight 22 is designed to for built-up welding to be welded into rounding, inclination or inclined-plane. For this purpose, as shown in figure 4, the first welding layer 26 be made to than be arranged in top the second welding layer 28 it is wide.Broader welding Layer 26 is particularly manufactured using higher welding current, oscillation welding method or lower welding feed rate.

The lateral flank 48 of screw flight 22 carries out mechanical post-treatments after it is by surfacing manufacturing.But it is this Post-process simultaneously not required that they be so.Optionally, wear-resisting tungsten carbide coating 50 has been manufactured on flank 48.The coating also leads to The built-up welding of overprotection gas welder 24 and single layer is made.

The cross section flank 52 of screw flight 22 is advantageously formed according to Fig. 6 with various variations.In such case Under, it includes thread neck part 56 in radial farther outside that cross section flank 52, which includes screw thread stabilizer blade 54 in radially inner side, and It include thread head 58 in outermost radial outside.

Cross section flank 52 according to two Variant Designs of upper left side in Fig. 6 in radial direction 16 radially outward by Gradual change is thin.According to two modifications of the lower right side in the middle and upper part in Fig. 6 a modification and Fig. 6, molding cross section screw thread Face 52 has features designed to the thread head 58 thickeied on 14 in the axial direction.

In several modifications, is formed on thread head 58 axially inclined towards scraping direction and carry the scraping of coating 50 Edge 60.

According to three of the middle and upper part in Fig. 6 modifications, cross section flank 52 has the first support webs 62 and second Web 64 is supportted, wherein the most of radial directed of support webs 62 and 64.In axial direction exist between support webs 62 and 64 Free space 66.In this way, lightweight and particularly stable structure static simultaneously have been manufactured.

Access portal 68 passes through at least one of support webs 62 and 64, and is specifically located at and screw flight 22 It scrapes in the second support webs 64 that side 70 deviates from.

According to the modification of upper right and lower left side in Fig. 6, molding cross section flank 52 prolongs with radially 16 The first part 72 stretched, and be designed to relative to the inclined second part 74 of radial direction 16.In this case, inclination angle The inclination of degree 76 or the second part 74 is preferably between 10 ° and 40 °, especially between 15 ° and 20 °.

According to several modifications of the upper and lower part in Fig. 6, molding cross section flank 52 has Part III 78, such as Seen in cross-section, Part III 78 is bent in the form of cylinder.

Screw rod hub 20 is equally manufactured at least partially through using the molding built-up welding of Shielding gas device 24.

In this case, relative to, compared with left side, screw rod hub 20 has cylindrical first longitudinal direction part 80 in Fig. 1, The first longitudinal direction part 80 is used as the second matrix for built-up welding herein.Longitudinal portion 80 itself be not correspondingly by built-up welding come Manufacture, but the pipe by further turner and milling is manufactured into a usual manner.

At longitudinal portion 80, the first bearing supporting element 82 of screw rod 10 is formed by turner or turner method.

There is the second longitudinal direction portion of conical butt in longitudinal portion face after 80s in the direction of the pivoting axis 12 on screw rod hub 20 Divide 84, which forms by forming built-up welding.In this case, the first annular welding layer 86, and On the layer, in the direction of the pivoting axis 12 or on the direction opposite with axial direction 14, the second welding layer 88 and it is multiple in addition The second welding layer be coated to longitudinal portion 84.

With this built-up welding, first longitudinal direction part 80 has moved and especially by turner, wherein then, protective gas Welder 24 will shift on the contrary with axial direction 14, but in addition will only slightly move radially to form frustum of a cone Shape.

There is cylindrical third longitudinal portion 92 behind second longitudinal direction part 84 is opposite with axial direction 14, the third is vertical To part 92 be substantially tubulose and manufacture in the usual way.Longitudinal portion 92 can also come advantageous by built-up welding Manufacture, to be designed to mesh shape.It can wherein introduce and be present in longitudinal portion to the inlet chamber 94 of clear phase mixture At 92.The inlet chamber 94 is manufactured in a particularly advantageous manner by forming built-up welding, is individually set because then can be formed on The flow surface of meter.

The exit opening 96 manufactured in the region of inlet chamber 94 in longitudinal portion 92 can be advantageous by built-up welding To be formed.

In the radially inner side or concentrically of rotary shaft 12, there are inlet tubes 98 in the region of longitudinal portion 92.The entrance Pipe 98 is equally advantageous manufactured by molding built-up welding, allows to purposefully be formed on special flowing and guidance Face.

In Fig. 7 to 10, the various embodiments of the access portal 40 in corresponding associated screw flight 22 are shown And associated screw rod hub 20.

In this case, had in a circumferential direction according to the radial single access portal 40 at center of Fig. 7 special Wide part.By the part, the middle layer to clear phase mixture can targetedly pass through screw flight 22.

According to Fig. 8, multiple access portals 40 radially 16 are arranged on two different radiuses.In such case Under, the width of the access portal 40 of radially outer in a circumferential direction is greater than the width of the access portal of inner radial.Moreover, sharp With the embodiment, the material of clarified circumferential layer that can targetedly pass through screw flight 22.

Fig. 9 shows one embodiment, and wherein access portal 40 is wider than radial outside in radially inner side.This width difference is set It counts into along the circumferential direction in step-like.Using the embodiment, after the radius of the step inside arrival, more materials are in spiral shell Pass through at bar screw thread 22.

Figure 10 finally shows one embodiment, and wherein access portal 40 is designed to obliquely incline relative to radial direction 16 Oblique straight trough.When material passes through them, this slot leads to mixing and therefore destroys to clear material.

In a word, it should be noted that in application documents, all features especially mentioned in dependent claims, although One or more specific rights requirements have been carried out with formal backward reference, but independent protection should be provided, even individually Or any combination of protection.

Reference signs list

10 screw rods

12 rotary shafts

14 axial directions

16 radial directions

18 rollers

20 screw rod hubs

22 screw flights

24 Shielding gas devices

First welding layer of 28 screw flights

Second welding layer of 28 screw flights

30 welding wires

32 welding gas

34 electric arcs

36 screw pitch

38 balance weights

40 access portals

42 disks

44 scrapers

46 transition parts

48 flanks

50 coatings

52 cross section flanks

54 screw thread stabilizer blades

56 thread neck parts

58 thread heads

60 scraping edges

62 first support webs

64 second support webs

66 free spaces

68 access portals

70 scrape side

The first part of 72 cross section flanks

The second part of 74 cross section flanks

76 tilt angles

The Part III of 78 cross section flanks

The first longitudinal direction part of 80 screw rod hubs

82 first bearing supporting elements

The second longitudinal direction part of 84 screw rod hubs

The first welding layer at 86 screw rod hubs

The second welding layer at 88 screw rod hubs

The third longitudinal portion of 92 screw rod hubs

94 inlet chamber

96 exit openings

98 inlet tubes