CN1454117A

CN1454117A - Impeller for centrifugal crushers with vertical axis and method for making same

Info

Publication number: CN1454117A
Application number: CN00819766A
Authority: CN
Inventors: 克洛德·蓬森
Original assignee: Magotteaux International SA
Current assignee: Magotteaux International SA
Priority date: 2000-08-02
Filing date: 2000-08-02
Publication date: 2003-11-05
Anticipated expiration: 2020-08-02
Also published as: KR100672270B1; ES2235923T3; JP4084996B2; HUP0301785A2; JP2004504147A; MXPA03001000A; SK286255B6; EP1305116A1; CA2412314C; AU2000264177B2; ATE292520T1; PL195796B1; HU226990B1; WO2002009878A1; CZ20024016A3; AU6417700A; CA2412314A1; DE60019346D1; CZ298653B6; KR20030014419A

Abstract

The invention concerns an impeller for centrifugal crushers with vertical axis. Initially, that is when it is used for the first time, said impeller does not comprise cavities or pockets, but it is provided on its working surface with a reinforcing structure, made of a composite material obtained from an alloy based on iron and ceramic grains with high wear resistance and formed on site when the impeller is cast by infiltrating molten metal for forming the part body in a mass of ceramic grains and binder. The wear to which it is subjected in operating automatically causes pockets or cavities to be formed which, when they are filled with crushed material, act as a protection against impacts.

Description

Be used to have the impactor and the manufacture method thereof of the centrifugal crusher of vertical axis

Technical field

The present invention relates to one is used to be called VSI type (vertical axis impactor) disintegrating machine, promptly has a vertical axis and have the impactor (being also referred to as flinger) of the centrifugal crusher of strengthening structure.

Background technology

The disintegrating machine of the above-mentioned type is known and is used for broken building stones in large quantities, as is used in stone pit and cement plant.

In other document that document WO 99/47264 and this publication are quoted as proof, all related to this disintegrating machine.

In these documents, centrifugal crusher comprises a cylindrical groove, wherein is mounted with a turntable, and it is by a vertical seat supports, and it comprises the device that turntable is rotated around the disintegrating machine central shaft.Disintegrating machine comprises a series of impactor or flingers that are fixed on the turntable, and a series ofly is positioned in anvil on the cylinder groove internal vertical walls around turntable.

Impactor generally has usually by castiron parallelepiped shape, and is fixed on the turntable of disintegrating machine.Impactor is called the head of impactor towards the face of the rotating shaft of turntable, and forms the exit face of impactor facing to the face that is fixed on the anvil on the cylindrical groove.

The front that is called as the impactor of working face is to run into the one side of wanting crushing material, and it on the direction of rotation of impactor in the back before.

The leading face of impactor can have one or more chambers; chamber does not penetrate the structural entity of impactor; and the formation cavity, cavity is filled by material when impactor rotates, impact and wearing and tearing that the material of therefore having protected impactor to avoid in the cavity to be piled up causes.

When fragmentation procedure, broken material to be circulated into the central authorities of turntable by known device.Under action of centrifugal force, and with the impact of described working face under, material is by the direction of impelling to anvil, material is crushed on anvil, drops to the bottom of disintegrating machine with the form of fragmentation, here they are discharged from.When the material impelling, impactor bears very large external force, thereby causes wearing and tearing fast.

The impactor that has cavity can be in some applications, the service life of obviously improving impactor owing to the sedimentation of material in the cavity.

Owing in the impactor of the type, can be observed wearing and tearing and be prone to the edge that exports at cavity most, that is to say that this is local because wearing and tearing that particle produced of centrifugal force impelling are maximum.

Document WO 99/47264 and other document of being quoted from thereof have proposed to provide protection or strengthening measure, to avoid or to reduce this wear effects.

In document WO 99/47264 the special solution that proposes be make have one or more cavitys, have an impactor that is parallelepiped substantially, in the reinforcement structure that all peripheries or the part periphery of its cavity are realized a composite, composite itself uses ferrous alloy and very wear-resisting ceramic particle to make.This structure is to form at the scene that penetrates into the impactor cast molding in ceramic particle and the adhesive piece by the liquid metal that is used to form the workpiece body, and it is for guaranteeing that the working life that improves impactor has demonstrated special effect.

Although this manufacture method has significant technological progress and very big technological merit, but some restrictions and difficulty have been shown.

It may be noted that at first to obtaining and strengthen effectively that the support member that ceramic particle and adhesive constituted must ideally infiltrate metal.

Therefore supporting both sides must have enough metal thickness, can infiltrate well so that strengthen the ceramic component of structure.This just needs to keep a bigger thickness of composite material work piece wallboard, has therefore just limited the size of cavity.Therefore this cause to improving the thickness that infiltration must limit ceramic reinforcement, and the restriction of this reinforcement thickness has reduced its effect and made it fragile more.

In addition, have a cavity and have under the situation of a plurality of cavitys at impactor, when starting for the first time, cavity is empty and the protection of the material that can not be subjected to wanting broken.

At this moment, Bao wallboard is exposed under the impact of maximum building stones or exterior object (iron block, shovel tooth etc.) especially.

This may cause the breaking of reinforcement wallboard of most fragile, and this has seriously damaged workpiece and often need replace it very apace after coming into operation for the first time.

In the vertical axis disintegrating machine, can be observed equally, the profile of wearing and tearing is normally more rambunctious, because working condition depends on different parameters, they changed according to the time, for example will add the granularity of material, lapping degree of building stones or the like.

According to the solution that document WO 99/47264 is proposed, the change of cavity shapes needs the change fully of casting mould and nuclear case, and can't estimate the result that will obtain.

The cost of this work is very big, and causes a large amount of time wastes.

In addition, if wish to change the profile of cavity, to be subject to equally and the aforementioned relevant selected shape of difficulty of infiltrating.

At last, in any case the wearing and tearing of impactor all are a subject matter in the VSI disintegrating machine, because the external force of wearing and tearing and impact is extremely serious.Be troubling thing the service life that increases impactor always.

Summary of the invention

The present invention is intended to solve the above problems, and also is to improve by the inherent advantage that utilizes document WO 99/47264 described impactor manufacturing technology the performance of impactor especially.

The present invention proposes a kind of impactor that is used to have the centrifugal crusher of vertical axis; be different from aforementioned background art; disintegrating machine is in initial; that is to say when using for the first time; do not have chamber or cavity; but its working surface is provided with one strengthens structure; it is made of the composite that obtains from ferrous alloy and very wear-resisting ceramic particle, and is to form at the scene that penetrates into the impactor cast molding in ceramic particle and the adhesive piece by the liquid metal that is used to form the workpiece body.

Described reinforcement structure is set on the working surface according to a suitable geometrical arrangements, so that make metal partly (promptly in the zone of not strengthening structure) flush with working surface, so that the wearing and tearing of work automatically cause the formation of cavity or chamber, and by wanting broken material to fill, by maintaining the reinforcement structure of the top periphery of the cavity that forms like this on the working face, can play the effect of protecting against shock.

The impactor of Huo Deing can solve aforesaid problem fully like this.

For related infiltration difficulty, in the present invention,, and be not only the metal that constitutes simple wallboard for the available metal amount of infiltrating support member is the total metal content that constitutes workpiece.In addition, can also introduce a more reinforcement of thickening in the place of needs, because a large amount of liquid metals is arranged, thereby be under the good infiltration condition.

Because cavity does not form at the very start, just eliminated fully when using for the first time owing to the danger that thin-walled part brought, because can realize enough thick wallboard.

Among the embodiment provided by the present invention, if wish to change the shape of cavity, the profile that only needs to change reinforcement gets final product, and this has reduced cost largely, and the possibility of better moulding and design is provided.In addition, can be not by the workpiece of casting in order to the sandbox core that forms cavity, this has just reduced production cost significantly.

At last, technology of the present invention can significantly be improved service life, because the formation of cavity Once you begin, has just enjoyed being contained in the automatic of material that is formed in the cavity and having protected.The progress that cavity forms is slow, when reaching it and be shaped fully, has just additionally obtained to be completed into the service life of needed time of this cavity.

As summary, we can say, the present invention is with the special benefits of passing through the composite that liquid metal penetrates in the ceramic block to be obtained is strengthened structure described in the document WO 99/47264, and the simplification and the advantage that needn't have the production of one or more cavitys with single workpiece combine.

Employed method is simple especially, because only need be by conventional means, for example gluing, mechanical fixation, nail, bolt, anchor pole etc., according to forming the desirable geometrical arrangements of one or more wearing and tearing cavitys, fix a filler with the ceramic technology material that resistance to wears in the bottom of mould, the form of aluminium oxide and zirconia-based ceramics particle and adhesive piece preferably, casting is used to constitute the metal material that impacts body then.Penetrate into metal in the ceramic block when having guaranteed work-piece cools with the perfect adaptation of the workpiece of casting.Then only need be with the workpiece demoulding, and after possible fine finishining (finishing or the like), impactor just can directly use.

Description of drawings

Other characteristics of the present invention and advantage will embody by explanation with reference to the accompanying drawings.

In the accompanying drawing,

Fig. 1: according to prior art have cavity, have a stereogram that metal infiltrates the impactor of ceramic reinforcement;

Fig. 2: have the reinforcement of same-type but do not have the stereogram of the impactor of cavity according to of the present invention;

Fig. 3: according to the longitudinal sectional view of the cavity profile of the impactor of Fig. 2 progressive route when the moulding.

The description of most preferred embodiment

In different accompanying drawings, use same reference number to represent identical or similar elements.

Traditional cavity impactor 1 that has according to Fig. 1 has one or more cavitys, is two cavitys 2 and 2 ' realizing by casting before impactor 1 uses at this.This impactor also has the reinforcement 4 that infiltrates pottery.The head 6 of impactor and the exit face 7 of impactor are subjected to same strong external force basically, and they can have auxiliary reinforcement, the reinforcement 8 shown in for example on Fig. 1.

In the embodiment shown in Figure 2, impactor 1 was a unitary solid piece before using, and did not have cavity on its working face 5, but had the reinforcement 4 that casting realizes.If wish to use two cavitys, these reinforcements can be as shown in Figure 2, according to Fig. 1 in the form form identical with layout arrange.Certainly, according to required purpose, can use other form and layout.

Fig. 3 shows because there was reinforcement 4 in workpiece before using, in use the progress of the cavity profile of Xing Chenging (progressive I, II, III).

Separation cavity 2 and 2 ' and by they shared middle reinforcements have been shown among Fig. 1, have had same thickness corresponding to the middle reinforcement of (and in Fig. 3) among Fig. 2.In the embodiment in figure 1, limited thickness,, in the monoblock of ceramic material, infiltrated metal and be unusual difficulty because in this case, and should difficulty in the situation of Fig. 2 because the workpiece of casting forming has the characteristics of " solid ", and do not occur.

Therefore, the present invention proposes a simple scheme that solves the different technologies problem in the impactor manufacturing, particularly brought bigger design freedom.Here the enforcement of the technology that is proposed is cheaply.The simplification of the increase of the cost of employed additional cast iron by working life, manufacturing and when casting workpiece, do not need special device to be set for generating cavity, and compensated widely.

For the head of impactor and the additional reinforcement of exit face, for example among Fig. 1 shown in the mark 8, also can use in the present invention, particularly in the embodiment of Fig. 2 and 3.In order to make accompanying drawing reason clearly, do not illustrate at this.

Claims

1. be used to have the impactor of the centrifugal crusher of vertical axis, it is characterized in that, it is initial, when promptly use the first time, do not have chamber or cavity, but its working surface (5) is provided with one strengthens structure (4), constitute by the composite that obtains from ferrous alloy and very wear-resisting ceramic particle, and be to form at the scene that penetrates into the impactor cast molding in ceramic particle and the adhesive piece by the liquid metal that is used to form the workpiece body.

2. impactor according to claim 1, it is characterized in that, described reinforcement structure (4) is arranged on the working surface (5) according to a suitable geometrical arrangements, so that metal is flushed with working surface (5) partly, so that the wearing and tearing of work automatically cause the formation of cavity or chamber, and,, can play the effect of protecting against shock by maintaining the reinforcement structure of the top periphery of the cavity that forms like this on the working face by wanting broken material to fill.

3. impactor according to claim 2 is characterized in that, it has one and strengthens structure (4), and its shape and layout make when wearing and tearing, cause the formation of at least one cavity.

4. impactor according to claim 3 is characterized in that, it has one and strengthens structure (4), and its shape and layout make when wearing and tearing, cause the formation of at least two cavitys.

5. according to the described impactor of one of claim 1 to 4, it is characterized in that ceramic particle is the particle of alumina base and zirconia base.

6. the manufacture method of the described impactor of one of claim 1 to 5, it is characterized in that, according to for later on by wearing and tearing can form the desirable geometrical arrangements of one or more cavitys, fix the filler of a wear-resistant ceramic material that can infiltrate by the deposite metal in the bottom of mould, then casting is used to constitute the metal that impacts body in a large number, make it and do not have the working surface in the zone of ceramic material filler to flush, ceramic material filler and metal reach by cooling combine after, the demoulding of carrying out workpiece is to form impactor.

7. the application of the described or resulting impactor of method by claim 6 of one of claim 1 to 5; be used for having the centrifugal crusher of vertical axis, the use wearing and tearing of the constituent material by on working surface, being strengthened structural defence and progressively form cavity.