WO2022008054A1 - Ensemble plaque d'usure - Google Patents

Ensemble plaque d'usure Download PDF

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Publication number
WO2022008054A1
WO2022008054A1 PCT/EP2020/069391 EP2020069391W WO2022008054A1 WO 2022008054 A1 WO2022008054 A1 WO 2022008054A1 EP 2020069391 W EP2020069391 W EP 2020069391W WO 2022008054 A1 WO2022008054 A1 WO 2022008054A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
material contact
contact plate
wear
coupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2020/069391
Other languages
English (en)
Inventor
Knut Kjaerran
Rowan Dallimore
Andreas Forsberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik SRP AB
Original Assignee
Sandvik SRP AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik SRP AB filed Critical Sandvik SRP AB
Priority to PCT/EP2020/069391 priority Critical patent/WO2022008054A1/fr
Publication of WO2022008054A1 publication Critical patent/WO2022008054A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2210/00—Codes relating to different types of disintegrating devices
    • B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like

Definitions

  • This invention generally relates to a wear plate assembly for a vertical shaft impact crusher having a material contact plate that can be replaced without requiring removal of the entire wear plate assembly from the vertical shaft impact crusher.
  • the invention also relates to a material contact plate and fixing plate for the wear plate assembly and to a vertical shaft impact crusher comprising the wear plate assembly.
  • VSI crushers find widespread use for crushing a variety of hard materials, such as rock, ore, demolished constructional materials and the like.
  • a VSI crusher comprises a housing that accommodates a horizontally aligned rotor mounted at a generally vertically extending main shaft.
  • the rotor is provided with a top aperture through which material to be crushed is fed under gravity from an elevated position.
  • the centrifugal forces of the spinning rotor eject the material outwards against a wall of compacted feed material (the stone bed) which also protects the walls of the rotor such that on impact the feed material is crushed to a desired size.
  • the rotor commonly comprises a horizontal upper disc and a horizontal lower disc provided with a centrally located distributor plate to protect the lower disc and distribute the material outwards for crushing.
  • the upper and lower discs are connected and axially separated by a plurality of upstanding rotor wall sections.
  • a top aperture is formed within the upper disc such that feed material flows downwardly towards the lower disc between the wall sections and is then ejected at high speed from the distributor plate.
  • the upper disc and lower discs are provided with wear plates to protect the discs with the wear plates on the lower disc being radially mounted between the distributor plate and the wall sections and being secured at the walls sections with wear plate fixings such as wedges and the like.
  • the wear plates, and in particular the lower wear plates are therefore subjected to substantial abrasive wear which significantly reduces their operational lifetime resulting in the need for regular replacement of the wear plates at service intervals.
  • Replacement of the wear plates, especially the lower wear plates is a time consuming and expensive operation. For example, due to the size and not insignificant weight of the wear plate it is a generally difficult task to handle the plate and install and remove it at the rotor. Moreover, replacement of the wear plates requires removal of the stone bed and the wear plate fixings.
  • the stone bed is formed over time and serves to protect the rotor from wear during use - the longer the stone bed remains in place without being broken or disturbed the better it lasts and protects the rotor.
  • the stone beds can be difficult and time consuming to remove.
  • removal and replacement of the wear plate fixings can also be time consuming and difficult.
  • PCT Patent Specification No. WO 2016/206753 describes an abrasion resistant wear plate provided with wear resistant tiles to minimise wear on the wear plate to in turn increase service intervals.
  • Chinese Patent Specification No. 201058299, PCT Patent Specification No. 2006/07661 , US Patent Specification No. 6554215 and European Patent Specification No. 276849 all describe VSI crushers provided with wear plates which endure varying degrees of wear. Nevertheless, all the wear plates of the VSI crushers of the prior art must still be fully removed for replacement resulting in the expense, downtime and damage to the stone bed outlined above.
  • An object of the invention is overcome at least some of the problems of the prior art.
  • a material contact plate for a wear plate assembly mountable to protect an upper or a lower disc of a rotor within a vertical shaft impact crusher from material fed into the rotor
  • the material contact plate comprising: a main body, and a material contact face on the main body against which material to be crushed can impact the wear plate assembly characterized in that the main body comprises a material contact plate coupling for releasably attaching the material contact plate to the wear plate assembly.
  • the material contact plate coupling defines an interference fit coupling.
  • the interference fit coupling on the material contact plate comprises a slidably releasable interference coupling so that the material contact plate is slidably attachable to and releasable from the wear plate assembly.
  • the interference fit coupling comprises a tap release interference fit coupling.
  • the interference fit coupling on the material contact plate comprises at least one male element projecting from the material contact plate.
  • the material contact face comprises at least one wear resistant tile having a wear resistance greater than that of the main body.
  • the material contact plate comprises a plurality of wear resistant tiles arranged in series on the material contact face.
  • the wear resistant tile comprises any one or a combination of aluminium oxide, zirconium oxide, silicon carbide, boron carbide, silicon nitride or boron nitride
  • the main body comprises an abrasion resistant steel such as manganese steel.
  • the invention also provides a fixing plate for a wear plate assembly mountable to fix the wear plate assembly in a vertical shaft impact crusher to protect an upper or a lower disc of a rotor within the crusher from material fed into the rotor, the fixing plate comprising: an elongate body releasably fixable to the upper or lower disc characterized in that the elongate body comprises a material contact plate coupling for releasably attaching a material contact plate to the fixing plate.
  • the material contact plate coupling on the fixing plate defines an interference fit coupling.
  • the interference fit coupling on the fixing plate comprises a slidably releasable interference coupling for slidably attaching a material contact plate to and slidably releasing a material contact plate from the fixing plate.
  • the interference fit coupling comprises a tap release interference fit coupling.
  • the fixing plate comprises an abrasion resistant steel.
  • the abrasion resistant steel comprises manganese steel.
  • the invention in a third aspect, relates to a wear plate assembly mountable to protect an upper or a lower disc of a rotor within a vertical shaft impact crusher from material fed into the rotor comprising: a fixing plate for fixing the wear plate assembly in a crusher; and a material contact plate contiguous with the fixing plate defining a material contact face against which material to be crushed can impact the wear plate assembly characterized in that the material contact plate is releasably attachable to the fixing plate at a material contact plate coupling defined between the fixing plate and the material contact plate so that the material contact plate is replaceable.
  • the material contact plate coupling defined between the fixing plate and the material contact plate is an interference fit coupling.
  • the interference fit coupling defined between the fixing plate and the material contact plate comprises a slidably releasable interference coupling so that the material contact plate is slidably attachable to and releasable from the fixing plate. More preferably, the interference fit coupling defined between the fixing plate and the material contact plate comprises a tap release interference fit coupling. In one embodiment, the interference fit coupling comprises at least one male element projecting from one of the fixing plate and the material contact plate and at least one complementary receiving element on the other of the fixing plate and the material contact plate.
  • the at least one male element is provided on the material contact plate and the complementary receiving element is provided on the fixing plate.
  • the material contact plate comprises a planar main body configured to define a rear wall for abutting the fixing plate, a front wall, a first end wall and a second oppositely disposed end wall
  • the fixing plate comprises an elongate body having a material contact plate abutting face, a first end face and a second opposite end face, the at least one male element being provided on the rear wall and the complementary receiving element being provided on the material contact plate abutting face.
  • interference fit coupling comprises a first male element on the rear wall disposed towards the first end wall, a second male element on the rear wall disposed towards the second end wall, a complementary first female element on the material contact abutting face disposed towards the first end face and a complementary second female element disposed towards the second opposite end face.
  • the main body of the material contact plate comprises a dual layer structure having an upper workplate defining the material contact face and a lower support plate on which the upper workplate is mounted, and the first and second male elements project outwardly from the lower support plate.
  • the invention also relates to a vertical shaft impact crusher comprising a wear plate assembly as hereinbefore defined.
  • the invention therefore generally provides a wear plate assembly for a VSI crusher made up of a fixing plate and a releasably attached material contact plate that can be replaced without requiring removal of the entire wear plate assembly from the vertical shaft impact crusher.
  • the wear plate assembly of the invention is therefore effectively a modular or multi-part wear plate assembly made up of the fixing plate and the detachable material contact plate. Accordingly, the replaceable material contact plate can be easily replaced without interfering with VSI crusher stone beds or requiring complete removal of the wear plate assemblies from VSI crushers as the fixing plate component of the wear plate assembly remains in place and only the removable material contact plate generally requires replacement.
  • the fixings such as nylon wedges generally employed to hold wear plates in place against the rotor walls of VSI crushers need not be disturbed or removed to replace the material contact plate. Wear plate servicing times and costs are therefore significantly reduced.
  • the replacement cost of the material contact plate portion of the wear plate assembly is considerably less than that of the replacement cost of an entire wear plate of the prior art resulting in reduced operating costs (cost per tonne of material) for customers.
  • users are only required to purchase complete sets of the wear plate assemblies of the invention for the upper and lower discs once - during first installation of a VSI crusher. Thereafter, users are only required to purchase the material contact plate to maintain the wear plate assemblies. This results in significant savings for users over the lifetime of VSI crushers.
  • the significant reduction in materials required to maintain the wear plate assemblies of the invention over the lifetime of the VSI crushers also results in associated environmental benefits.
  • end of life wastage is reduced due to the smaller size of the material contact plates.
  • the material contact plate also weighs significantly less than a conventional wear plate of the prior art, the material contact plate is easier to handle and manipulate during replacement than known wear plates.
  • the reduced size and weight of the replaceable material contact plates compared with a known complete wear plate allows for reduced manufacturing (due to reduced manufacturing material requirements e.g. steel), storage and transportation costs and an associated reduced carbon footprint both locally and internationally.
  • the replaceable material contact plate is also significantly smaller and lighter than a known complete wear plate, the material contact plate can be more easily stocked locally for speedy delivery to customers thereby permitting lower stock holding for customers.
  • Figure 1 is a perspective view from above and one side of the rotor of a VSI crusher of the invention with the upper disc and a wall section removed to reveal two wear plate assemblies of the invention each made up of a fixing plate of the invention attached to a replaceable material contact plate of the invention with the wear plate assemblies located either side of a distributor plate on the lower disc of the rotor;
  • Figure 2 is a perspective view from above and one side of the rotor of Figure 1 with one of the replaceable material contact plates detached from the fixing plate of one of the wear plate assemblies at the material contact plate coupling and the location of a stone bed indicated by the arrow A;
  • Figure 3 is an enlarged perspective view from above and one side of a wear plate assembly of the invention in which the material contact plate of the invention is detached from the fixing plate of the invention;
  • Figure 4 is a front perspective view from above and one end of the wear plate assembly of Figure 3;
  • Figure 5 is a rear perspective view from below and one end of the wear plate assembly of Figure 3;
  • Figure 6 is a top plan view of the wear plate assembly of Figure 3 with the direction of impact of a tap force required to secure the material contact plate to the fixing plate indicated by the arrow B;
  • Figure 7 is a rear plan view of the wear plate assembly of Figure 3.
  • Figure 8 is a top plan view of an embodiment of the wear plate assembly of Figures 3 to 7 made up of the fixing plate and the material contact plate but with the material contact plate attached to the fixing plate at the material contact plate coupling to form the wear plate assembly and with the direction of impact force required to release the material contact plate from the fixing plate indicated by the arrow C;
  • Figure 9 is a side elevation of the wear plate assembly of Figure 8 from the material contact plate side;
  • Figure 10 is a rear plan view of the wear plate assembly of Figure 8.
  • Figure 11 is a side elevation of the wear plate assembly of Figure 10.
  • a rotor of a vertical shaft impact (VSI) crusher is generally indicated by the reference numeral 1 and is made up of a lower horizontal disc 2, an upper oppositely disposed horizontal disc (not shown) separated from the lower disc 2 by vertical rotor walls 3.
  • the material to be crushed enters the rotor 1 through a central opening in the upper disc while the vertical side walls 3 channel the flow of the material through the rotor 1 .
  • the vertical rotor walls 3 extend between the lower disc 1 and the upper disc and are disposed towards the periphery 39 of the lower disc 1 .
  • the rotor 1 is provided with three vertical rotor walls 3 extending between the lower horizontal disc 2 and the upper horizontal disc (one of the vertical walls 3 being omitted from Figures 1 and 2 for clarity) and separated by material outflow openings 40.
  • Each vertical rotor wall 3 has a main wall section 41 and two oppositely disposed first and second end wall sections 42,43.
  • the first end wall section 42 can be provided with an elongate wear tip 45 (omitted from one of the first end wall sections of Figure 2 for clarity) disposed vertically with respect to the lower horizontal disc 2.
  • the second end wall section 43 is provided with a vertically disposed wear tip shield 46 which extends substantially radially outwards from the second end wall section 43.
  • a stone bed of material to be crushed forms against the vertical rotor walls 3 between the first and second end wall sections 42,43 during use to protect the rotor walls 3 and against which material is crushed during operation of the VSI crusher. Crushed material exits the rotor 1 through the material outflow openings 40.
  • the lower disc 2 is attached to a central hub 4 which is in turn mounted on a rotatable vertical shaft (not shown) to effect rotation of the rotor 1 and crushing of materials fed into the rotor 1 .
  • the central hub 4 is also surrounded by a central opening 8 defined in the lower disc 2.
  • the rotor 1 is mounted within a VSI crusher housing (not shown).
  • the lower disc 2 and the upper disc are both provided with modular or multi-part wear plate assemblies 5 of the invention to protect the lower and upper discs from abrasive wear. More particularly, the lower and upper discs are provided with three wear plate assemblies 5 with only two of the wear plate assemblies 5 on the lower disc 2 being shown in Figures 1 and 2 for clarity.
  • the wear plate assemblies 5 of the lower disc 2 surround a raised distributor plate 6 centrally mounted above the hub 4 for distributing material to be crushed towards the rotor walls 3 upon rotation of the rotor 1 .
  • the distributor plate 6 also serves to protect the lower disc 2 from wear.
  • the distributor plate 6 is releasably secured to the hub 4 by distributor plate mountings 7 extending between the distributor plate 6 and the hub 4.
  • the distributor plate mountings 7 can be in the form of (generally three) brackets 7 which surround the distributor plate 6 and are secured between the distributor plate 6 and the lower horizontal disc 2.
  • Figure 3 shows an enlarged perspective view from above and one side of a wear plate assembly 5 of the invention.
  • the wear plate assembly 5 is substantially planar and elongate in shape and is configured, sized and contoured to at least partially cover the lower and upper discs of the rotor 1.
  • each wear plate assembly 5 is a two-part wear plate assembly 5 made up of a fixing plate 10 for fixing the wear plate assembly 5 in a crusher and a material contact plate 9 contiguous with the fixing plate 10 which defines an upper material contact face 24 against which material to be crushed impacts against the wear plate assembly 5.
  • the fixing plate 10 and the material contact plate 9 are shown in a detached or separated configuration in the drawing. More particularly, the material contact plate 9 is releasably attached to and detachable from the fixing plate 10 at a material contact plate coupling 14 defined between the fixing plate 10 and the material contact plate 9 so that the material contact plate 9 can be replaced as required without requiring removal of the entire wear plate assembly 5 (including the fixing plate 10) or removal/disruption of the stone bed formed against the rotor walls 3 during use.
  • the fixing plate 10 is typically mounted in place on the lower disc 2 or upper disc in the rotor 1 by fixings 11 such as nylon wedges 11 which abut the outer/upper surface 38 of the fixing plate 10 and are inserted in complementary fixing openings 12 defined in the walls 3.
  • fixings 11 such as nylon wedges 11 which abut the outer/upper surface 38 of the fixing plate 10 and are inserted in complementary fixing openings 12 defined in the walls 3.
  • Figures 4 and 5 show front and rear perspective views of the wear plate assembly 5 of Figure 3 and more clearly illustrate the structure of the material contact plate 9 and the fixing plate 10.
  • the material contact plate 9 of each wear plate assembly 5 is made up of a planar main body 13 provided with a material contact plate coupling 14 configured to couple between the material contact plate 9 and the fixing plate 10 for releasably attaching the material contact plate 9 to the fixing plate 10.
  • the planar main body 13 is substantially flat and is generally sized and contoured to extend radially about the distributor plate 6 between the distributor plate 6 and the fixing plate 10 secured to the vertical rotor walls 3 between the first and second end wall sections 42,43 shown in Figures 1 and 2.
  • the planar main body 13 is shaped and configured to define an elongate rear wall 15 for abutting the fixing plate 10, a contoured front wall 16 disposable towards the distributor plate 6, a first end wall 17 and a second oppositely disposed end wall 18.
  • the contoured front wall 16 is shaped and contoured in a stepped manner to extend around and towards the distributor plate 6 and the distributor plate mountings 7 at the hub 4 to accommodate the distributor plate 6 and the distributor plate mountings 7 in recesses 47 defined by the contoured front wall 16.
  • first end wall 17 is shaped and contoured to fit against the first end wall section 42 of the vertical rotor walls 3 and, more particularly, is contoured to define a notch-shaped indent 48 to abut against the wear tip 45 shown in Figures 1 and 2.
  • the main body 13 of the material contact plate 9 has a dual layer structure made up of an upper substantially planar workplate 19 against which material to be crushed impacts the material contact plate 9 and a lower substantially planar support plate 20 for abutting the upper or lower horizontal discs on which the upper workplate 19 is mounted e.g. by mechanical attachment or bonding materials.
  • the upper workplate 19 of the material contact plate 9 defines the material contact face 24 against which material fed into the rotor 1 via the upper disc impacts the material contact plate 9.
  • the upper work plate 19 comprises three wear resistant tiles 25 at the material contact face 24 having an increased abrasive wear resistance i.e. a wear resistance greater than that of the main body 13.
  • the wear resistant tiles 25 are of a generally parallelogram shape and are arranged side-by-side in a continuous series on the material contact face 24.
  • the shape, size, number and arrangement of the wear resistant tiles 25 can be varied a required.
  • the fixing plate 10 of the two-part wear plate assembly 5 is made up of a generally rectangular elongate body 26 having a continuous elongate rotor wall abutting face 27, an oppositely disposed material contact plate abutting face 28, a first end face 29 and a second opposite end face 30.
  • the fixing plate 10 is generally sized to have a footprint commensurate with the thickness of the stone bed to be formed in the VSI crusher.
  • the first end face 29 is also shaped to define an inclined or tapered end face 31 to mate against the first end wall section 42, including the elongate wear tip 45, of the vertical rotor walls 3.
  • Figures 6 and 7 show top and rear plan views of the wear plate assembly 5 again with the material contact plate 9 separated from the fixing plate 10 and, in combination with Figures 4 and 5, illustrate the material contact plate coupling 14 for releasably securing the material contact plate 9 to the fixing plate 10.
  • a first coupling element 21 of the releasable material contact plate coupling 14 is located at the rear wall 15 of the main body 13 of the material contact plate 9.
  • the first coupling element 21 is a rearwardly extending coupling element 21 and is adapted to form an interference fit with the fixing plate 10 so that the material contact plate coupling 14 is an interference fit coupling 14
  • the first coupling element 21 is configured to define a male first coupling element 21.
  • the first coupling element 21 on at the rear wall 15 is made up of a first male element in the form of a first outwardly projecting lug or tongue 21 projecting rearwardly outwards from the rear wall 15 (in the direction of the fixing plate 10) adjacent the first end wall 17 and a second male element in the form of a second outwardly projecting lug or tongue 22 also projecting rearwardly outwards from the rear wall 15 adjacent the second end wall 18.
  • the first and second lugs 21,22 are configured to project substantially perpendicularly outwards with respect to the rear wall 15 to define at least in part an angle of 90° with respect to the rear wall 15.
  • the first and second lugs 21 ,22 only project rearwardly from the lower support plate 20 and thus have a thickness less than that of the main body 13 i.e. in the present embodiment the first coupling element 21 of the releasable contact plate coupling 14 does not project from the upper workplate 19 of the main body 13 of the material contact plate 9.
  • the first and second lugs 21 ,22 enjoy a slidably releasable friction interference fit with complementary material contact plate coupling elements formed on the fixing plate 10 so that the upper workplate 19 protects the releasable material contact plate coupling 14 in use.
  • the planar main body 13 of the material contact plate 9 is further provided with a disc mounting in the form of an outwardly extending step 23 for securing the material contact plate 9 to the lower disc 2 or upper disc as required.
  • the outwardly extending step 23 can be secured in place by a fastener such as a bracket or similar fastener e.g. a right-angle bracket.
  • a second complementary coupling element of the releasable material contact plate coupling 14 is located on the material contact abutting face 28 of the elongate body 26 of the fixing plate 10. More particularly, the material contact abutting face 28 is provided with receiving elements which can be female receiving elements in the form of material contact plate mountings 32 adapted to releasably receive and hold the rearwardly outward projecting first and second lugs 21 ,22 of the material contact plate 9.
  • the material contact plate mountings 32 are adapted to receive the first and second lugs 21 ,22 of the material contact plate 9 in a sliding interference fit and are made up, firstly, of a first lug contact member 33 at the tapered end face 31 defined by an inward notch 34 formed in the fixing plate elongate body 26.
  • the inward notch 34 extends inwards into, and in part completely through, the fixing plate 10, from the material contact plate abutting face 28 to define a through-hole portion 49 extending completely through the fixing plate 10 adjacent the first lug contact member 33.
  • the first lug contact member 33 has a thickness less than that of the elongate body 26 to define a first groove-like lug bearing face 35 to receive the first lug 21 in a slidable manner so that an interference or friction fit is formed between the first lug 21 and the first groove like lug bearing face 35.
  • the first lug contact member 33 and the first lug 21 are sized to have thicknesses that together have a thickness equivalent to that of the wear plate assembly 5 when the material contact plate 9 is coupled to the fixing plate 10 to ensure that the material contact plate 9 and fixing plate 10 are uniformly contiguous.
  • the elongate body 26 of the fixing plate 10 is provided with a terminal indent like recess 36 at the second end face 30 and a second lug contact member 37 within the recess 36 to slidably receive the second lug 22 in a friction fit.
  • the second lug contact member 37 also has a thickness less than that of the elongate body 26 to define a second groove-like lug bearing face 44 to receive the second lug 22 in a slidable manner so that an interference or friction fit is formed between the second lug 22 and the second groove-like lug bearing face 44.
  • the second lug contact member 37 and the second lug 22 are sized to have relative thicknesses that together have a thickness equivalent to that of the wear plate assembly 5 when the material contact plate 9 is coupled to the fixing plate 10
  • the material contact plate 9, and in particular the material contact face 24, is flush with the upper/outer surface 38 of the fixing plate 10 when attached so that the material contact plate 9 is uniformly contiguous with the fixing plate 10.
  • Figure 8 shows a top plan view of the material contact plate 9 and fixing plate 10 of Figures 3 to 7 but with the material contact plate 9 attached to the fixing plate 10 at the material contact plate coupling 14 to form the assembled wear plate assembly 5.
  • the rear wall 15 of the material contact late 9 therefore abuts the oppositely disposed complementary material contact plate abutting face 28 of the fixing plate 10 to form the wear plate assembly 5.
  • the material contact plate 9 is positioned as shown in Figure 6 with the first lug 21 disposed in the through-hole portion 49 of the inward notch 34 of the fixing plate 10 and the second lug 22 disposed adjacent the second lug contact member 37 within the recess 36 of the fixing plate 10.
  • the material contact plate 9 is then urged into contact with the fixing plate 9 (in the direction indicated by the arrow B in Figure 6) to form the interference fit at the coupling 14.
  • Figure 9 shows a side view of the wear plate assembly of Figure 8 from the material contact plate side.
  • the releasable material contact plate coupling 14 is sized so that, when the material contact plate 9 is coupled to the fixing plate 10, the material contact plate 9 and fixing plate 10 of the wear plate assembly are uniformly contiguous.
  • Figures 10 and 11 show rear plan and side views of the wear plate assembly 5 of Figures 8 and 9. As shown in the drawings, in the assembled position, the first lug 21 of the material contact plate 9 abuts the first bearing surface 35 of the fixing plate 19 and the second lug 22 of the material contact plate 9 abuts the second bearing surface 37 of the fixing plate 10 to form the interference fit between the material contact plate
  • a VSI crusher is generally supplied with the wear plate assemblies 5 in situ - i.e. with the wear plate assemblies 5 secured to the vertical rotor walls 3 and the lower disc 2 and the upper disc as previously described via the fixings 11 and the disc mountings 23 and associated brackets.
  • the rotor 1 is rotated by the rotatable vertical shaft to direct material fed into the rotor towards the vertical rotor walls 3.
  • a stone bed, indicated by the arrow A, is formed through use, which protects the vertical walls 3.
  • the stone bed generally forms over the fixing plate 10.
  • the wear plate assemblies 5 may require attention, generally due to wear, at regular service intervals. Flowever, unlike conventional wear plates, it is not necessary to replace the entire wear plate assemblies 5 to renew the wear plate assembly 5 - as indicated above only the material contact plate 9 requires replacement and the fixing plate 10 can remain in situ. More particularly, in order to replace the material contact plate 9, an operative simply accesses the rotor 1 , releases the fastener at the outwardly extending step 23 of the material contact plate 9 and subjects the material contact plate 9 to a side impact or tapping force in the direction indicated by the arrow C in Figure 8 to overcome the interference fit at the material contact plate coupling 14 (i.e. the material contact plate coupling 14 defines a tap release interference fit).
  • the resultant impact force therefore causes the first and second lugs 21 ,22 to slide from the respective first and second lug bearing faces 35,44 to detach the material contact plate 9 from the fixing plate 10.
  • the material contact plate 9 can then be lifted from the lower disc 2 with the lug 21 passing through the through-hole portion 40 of the notch 34 of the fixing plate 10 and the lug 22 passing through the terminal recess of the fixing plate 10.
  • the fixing plate 10 is maintained in place by the fixings 11 so that the stone bed that has accumulated over the fixing plate 10 remains undisturbed.
  • the worn material contact plate 9 is then replaced by a new material contact plate 9 in a reverse operation. More particularly, the operative first positions the new material contact plate 9 on the lower disc 2 (or upper disc) adjacent the fixing plate 10 as shown for example in Figures 3 and 6 i.e. with the first lug 21 in the notch 34 of the fixing plate 10 and the second lug 22 at the terminal recess 36 of the fixing plate 10. The operative then subjects the material contact plate 10 to an impact or tapping force in the direction indicated by the arrow B to urge the first lug 21 against the first bearing face 35 and the second lug 22 against the second bearing face 44 to form the secure interference or friction fit between the material contact plate 9 and the fixing plate 10. As indicated above, the tightness of the interference fit increases during use due to the centrifugal forces to which the wear plate assemblies 5 are subjected.
  • the wear plate assemblies 5 of the invention can be formed from any suitable materials.
  • the material contact plate 9 can be formed from abrasion resistant materials such as abrasion resistant steel or metal alloys such as nodular iron, high carbon steel or manganese steel.
  • the support plate 20 of the material contact plate 9 can be formed from a less abrasion resistant material which can be selected to be lightweight whilst providing sufficient structural strength for the material contact plate 9.
  • the fixing plate 10 can also be formed from abrasion resistant materials such as abrasion resistant steel or metal alloys such as nodular iron, high carbon steel or manganese steel.
  • the wear resistant tiles 25 are formed from materials having an increased wear resistance compared with the material of the material contact face 24. Suitable materials include any one or a combination of aluminium oxide, zirconium oxide, silicon carbide, boron carbide, silicon nitride or boron nitride.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

L'invention concerne un ensemble plaque d'usure (5) pouvant être monté pour protéger un rotor (1) à l'intérieur d'un broyeur à impact à arbre vertical d'un matériau introduit dans le rotor (1), l'ensemble comprenant une plaque de fixation (10) pour fixer l'ensemble plaque d'usure (5) dans un broyeur ; et une plaque de contact de matériau (9) contiguë à la plaque de fixation (10) définissant une face de contact de matériau (24) sur l'ensemble plaque d'usure (5) ; la plaque de contact de matériau (9) pouvant être fixée amovible à la plaque de fixation (10) au niveau d'un couplage de plaque de contact de matériau (14) défini entre la plaque de fixation (10) et la plaque de contact de matériau (9) de telle sorte que la plaque de contact de matériau (9) soit remplaçable.
PCT/EP2020/069391 2020-07-09 2020-07-09 Ensemble plaque d'usure Ceased WO2022008054A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/069391 WO2022008054A1 (fr) 2020-07-09 2020-07-09 Ensemble plaque d'usure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/069391 WO2022008054A1 (fr) 2020-07-09 2020-07-09 Ensemble plaque d'usure

Publications (1)

Publication Number Publication Date
WO2022008054A1 true WO2022008054A1 (fr) 2022-01-13

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276849A2 (fr) 1987-01-30 1988-08-03 Neyrtec Sa Concasseur rotatif à aubes de projection protégées
US4796822A (en) * 1983-11-18 1989-01-10 Acrowood Corporation Impeller for an impact crusher
US4896838A (en) * 1988-10-31 1990-01-30 Cedarapids, Inc. Rotor for vertical shaft impact crushers
EP0607977A2 (fr) * 1993-01-22 1994-07-27 Nakayama Iron Works, Ltd. Arrangement de marteaux pour rotor d'un broyeur vertical à impact
US6554215B1 (en) 2000-10-31 2003-04-29 Cedarapids Inc. Wear protection for tables for centrifugal impact crushers
CN201058299Y (zh) 2007-07-05 2008-05-14 贵州优利斯凯机械有限公司 一种立轴式冲击破碎机的组合多功能转子
WO2016206753A1 (fr) 2015-06-26 2016-12-29 Sandvik Intellectual Property Ab Partie d'usure résistant à l'abrasion pour rotor de broyeur à impact à arbre vertical (vsi)

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796822A (en) * 1983-11-18 1989-01-10 Acrowood Corporation Impeller for an impact crusher
EP0276849A2 (fr) 1987-01-30 1988-08-03 Neyrtec Sa Concasseur rotatif à aubes de projection protégées
US4896838A (en) * 1988-10-31 1990-01-30 Cedarapids, Inc. Rotor for vertical shaft impact crushers
EP0607977A2 (fr) * 1993-01-22 1994-07-27 Nakayama Iron Works, Ltd. Arrangement de marteaux pour rotor d'un broyeur vertical à impact
US6554215B1 (en) 2000-10-31 2003-04-29 Cedarapids Inc. Wear protection for tables for centrifugal impact crushers
CN201058299Y (zh) 2007-07-05 2008-05-14 贵州优利斯凯机械有限公司 一种立轴式冲击破碎机的组合多功能转子
WO2016206753A1 (fr) 2015-06-26 2016-12-29 Sandvik Intellectual Property Ab Partie d'usure résistant à l'abrasion pour rotor de broyeur à impact à arbre vertical (vsi)

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