Abstrict A protection arrangement for a hopper seal in a conical crusher
having a material feed hopper located within the upper portion of
the crusher bowl, over the crusher bowl liner. The protection arrangement
preventing material and liquid flowing from the hopper into the
crusher bowl from flowing against and abrading components of the
hopper seal. The protection arrangement including an upwardly extending
lip on the bowl liner which is received within a discharge hole
in the bottom of the hopper.
Claims What is claimed is:
1. A conical crusher having a bowl, a bowl liner located within
and supported on said bowl, a material feed hopper having a top
and a bottom, said hopper located within said bowl and positioned
above said bowl liner, a sealing system being provided between said
bottom of said hopper and said bowl liner, said bottom of said hopper
being provided with an opening through which material may flow from
said hopper into said bowl liner, said bowl liner being provided
with an upwardly extending lip which extends within the opening
formed in said bottom of said hopper, whereby material flowing from
said hopper into said bowl liner is prevented from contacting said
sealing system so as to prevent abrasive wear of said sealing system.
2. In the conical crusher of claim 1 said upwardly extending lip
having an inner surface which is a continuation of the inner surface
of said bowl liner.
3. In the conical crusher of claim 1 said bottom of said hopper
having an upper surface essentially level with the top of said lip.
4. A bowl liner for a water flush crusher, the water flush crusher
including a seal disposed between the bowl liner and a material
feed hopper of the crusher, the bowl liner comprising:
an inside conical surface having a top side and a bottom side;
an inside vertical surface having a bottom side integral to the
top side of the inside conical surface;
an outside conical surface having a top side and a bottom side,
the bottom side of the inside conical surface being adjacent the
bottom side of the outside conical surface;
an outside vertical surface having a top side and a bottom side,
the bottom side of the outside vertical surface being integral to
the top side of the outside conical surface;
a horizontal surface adjacent to the top side of the outside vertical
surface, the horizontal surface adapted to support the seal; and
a lip formed above the horizontal surface and the top side of the
inside vertical surface, the lip having a width approximately less
than 60% of the distance between the inside vertical surface and
the outside vertical surface, the lip adapted to protect the seal
disposed between the bowl liner and the material feed hopper of
the rock crusher.
5. The bowl liner of claim 4 wherein the lip has a width of approximately
57% of the distance between the inside vertical surface and the
outside vertical surface.
6. The bowl liner of claim 5 wherein the horizontal surface has
a width approximately equal to the distance between the inside vertical
surface and the outside vertical surface.
7. The bowl liner of claim 5 wherein the lip has a height approximately
equal to the distance between the inside vertical surface and the
outside vertical surface.
8. The bowl liner of claim 4 wherein the inside conical surface
and outside conical surface are integrally connected by a bottom
angled surface.
9. The bowl liner of claim 8 wherein the inside conical surface
has a step.
10. The bowl liner of claim 4 wherein a ridge is disposed in the
horizontal surface for receiving the seal.
11. The bowl liner of claim 4 wherein the horizontal surface includes
a groove for receiving the seal.
12. The bowl liner of claim 4 wherein the seal is rubber.
13. The bowl liner of claim 6 wherein the combination of the width
of the lip and a width of the horizontal surface is greater than
the distance between the inside vertical surface and the outside
vertical surface.
14. The bowl liner of claim 13 wherein the combination of the
width of the lip and the width of the horizontal surface is more
than twice the distance between the outside vertical surface and
the inside vertical surface.
15. A conical crusher having a bowl, a bowl liner located within
and supported on the bowl, a feed hopper, and a liquid resilient
member interposed between the bowl liner and the hopper, the conical
crusher comprising:
a ridge disposed on the bowl liner, the ridge configured to protect
the liquid resilient member when the liquid resilient member is
placed between the bowl liner and the hopper.
16. The conical crusher of claim 15 wherein the liquid resilient
member is hollow rubber.
17. The conical crusher of claim 15 wherein the ridge is slightly
spaced apart from the feed hopper.
18. The conical crusher of claim 17 wherein the ridge extends
at a 90.degree. angle from a horizontal surface on the bowl liner.
19. A conical crusher comprising:
a bowl;
a bowl liner located within and supported on the bowl;
a feed hopper;
a liquid resilient member interposed between the bowl liner and
the feed hopper; and
wherein a ridge is disposed on the bowl liner, the ridge configured
to protect the liquid resilient member when the member is placed
between the bowl liner and feed hopper, whereby material flowing
from said hopper into said bowl liner is prevented from contacting
said liquid resilient member so as to prevent abrasive wear of said
liquid resilient member.
20. The conical of claim 19 wherein the liquid resilient member
includes rubber.
Description CROSS REFERENCE TO RELATED APPLICATIONS
The present application is related to U.S. application Ser. No.
08/690866now abandoned entitled, "Hopper Seal For Fluid Flushed
Conical Crusher," filed on an even date herewith, assigned
to the Assignee of the present invention and invented by Jacobson.
FIELD OF THE INVENTION
This invention relates to a conical crusher, and more particularly
to crushers provided with a material feed hopper positioned above
the crusher to dispense material to be crushed into the crusher.
To aid in the crushing operation, such crusher are frequently provided
with a fluid or liquid feed which dispenses a fluid or liquid through
the material feed hopper directly into the crushing cavity of the
crusher.
BACKGROUND OF THE INVENTION
Conical crushers have been provided in the past with material feed
hoppers located over the central cone or mantle and bowl liner,
and within an upwardly extending portion of the crusher bowl. Material
to be crushed is dispensed from the feed hopper into the crushing
cavity formed between the mantle and the bowl liner. To improve
the performance of such crushers, a liquid, generally water is directed
into the crushing cavity through nozzles located above the material
feed hopper. In such crushers, the crusher bowl is adjustably supported
on the crusher frame to permit it to be raised or lowered with respect
to the frame. Securing or clamping arrangements are provided to
support the bowl liner within and on the crusher bowl. By adjusting
the vertical position of the bowl liner, the position of the bowl
liner with respect to the mantle is adjusted to adjust the width
of the crushing cavity between the bowl liner and the mantle.
In such crushers it is most desirable to prevent the material being
crushed and particularly the liquid added to it from entering the
confined space defined by the crusher bowl liner, the crusher bowl,
and the material hopper. The entry of the material being crushed
and particularly the liquid, which is usually water, into the confined
space can cause corrosion of the securing or clamping arrangement
used to support the bowl liner within and on the crusher bowl, thereby
making release of the securing arrangement for the purpose of replacing
the bowl liner most difficult. Further, the entry of liquid and
the material being crushed into the confined space may result in
caking of the material in the confined space. This caked material
may be most difficult to remove when it becomes necessary to remove
and replace a worn bowl liner.
While material feed hoppers have been resiliently supported on
the bowl liner and/or bowl of conical crushers in the past, the
resilient supporting arrangement has not provided a sealing arrangement
to prevent material being crushed and liquid introduced into the
hopper from reaching the above-mentioned confined space. In such
conical crushers the resilient support has been provided a porous
resilient member through which a liquid and fine material may pass.
SUMMARY OF THE INVENTION
The present invention relates to a water flush conical crusher
having a bowl, a bowl liner located within and supported on the
bowl, a feed hopper and a liquid resilient member interposed between
the bowl liner and the hopper. The water flush conical crusher includes
a ridge disposed on the bowl liner. The ridge is configured to protect
the member when the member is placed between the bowl liner and
the hopper.
The present invention also relates to a bowl liner for a water
flush crusher. The water flush crusher includes a seal disposed
between the bowl liner and another portion of the rock crusher.
The bowl liner includes an inside conical surface having a top side
and a bottom side, an inside vertical surface having a bottom side
integral to the top side of the inside conical surface, an outside
conical surface having a top side and a bottom side, an outside
vertical surface having a top side and a bottom side, a horizontal
surface adjacent to the top side of the outside vertical surface,
and a lip. The bottom side of the inside conical surface is adjacent
the bottom side of the outside conical surface. The bottom side
of the outside vertical surface is integral to the top side of the
outside conical surface. The lip is formed above the horizontal
surface and the top side of the inside vertical surface. The lip
has a width approximately less than 60% of the distance between
the inside vertical surface and the outside vertical surface. The
lip protects the seal disposed between the bowl liner and the another
portion of the rock crusher.
The present invention even further relates to a method of manufacturing
or repairing a conical crusher. The conical crusher includes a liquid
resilient seal disposed between a bowl liner and a hopper. The method
includes steps of positioning a lip of the bowl liner adjacent a
bottom side of the hopper to protect the liquid resilient seal,
and securing the bowl liner to the rock crusher.
In a conical crusher having a material feed hopper located over
the central cone or mantle and bowl liner, and within an upwardly
extending portion of the crusher bowl, and having a sealing arrangement
to prevent the entry of material being crushed into a confined space
defined by the crusher bowl, bowl liner, and hopper, it is an aspect
of this invention to provide an arrangement for protecting the sealing
system between the bowl liner and the feed hopper. It is another
aspect of the invention to provide in a conical crusher as described
above, having a liquid feed which dispenses a liquid through the
material feed hopper into the crushing cavity of the crusher, an
arrangement for protecting the sealing system which prevents the
entry of the liquid and the material being crushed into the confined
space defined by the crusher bowl, bowl liner, and hopper from abrasion
and wear by the material and liquid passing through the hopper into
the crusher cavity. It is still another aspect of this invention
to provide protection for the sealing system between the hopper
and the bowl liner without adding additional separate parts to the
crusher which would result in additional costs in manufacturing
and assembling the crusher.
In accordance with another aspect of this invention, a conical
crusher provided with a sealing arrangement such that material placed
in the hopper and liquid directed into the hopper are prevented
from reaching the confined space defined by the bowl liner, bowl
and hopper, is provided with an arrangement for protecting the portion
of the sealing arrangement between the hopper and the bowl liner.
The material feed hopper is located within an upwardly extending
portion of the crusher bowl, and over the crusher bowl liner. A
pair of resilient non-porous members, one interposed between facing
surfaces of the bowl and the hopper, and the other between facing
surface of the bowl liner and the hopper, form seals between the
hopper and the bowl and between the hopper and the bowl liner. The
hopper is supported on the pair of resilient non-porous members,
such that the weight of the hopper provides a compressive force
on the resilient non-porous members to cause them to sealingly engage
the hopper and the bowl and bowl liner facing surfaces. The upper
edge of the bowl liner is provided with an upstanding lip which
closely surrounds the edge of a hole in the bottom of the hopper
through which material and liquid flows from the hopper into the
crusher cavity. This lip protects the resilient non-porous member
between the hopper and the bowl liner from being contacted by the
material and liquid flowing from the hopper into the crusher cavity.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary perspective elevational cut-away view of
a conical crusher showing a sectional view of a sealing arrangement
in accordance with this invention;
FIG. 2 is an enlarged cross-sectional view of the encircled portion
2--2 of the elevational view shown in FIG. 1;
FIG. 3 is an enlarged cross-sectional view of the encircled portion
3--3 of the elevational view shown in FIG. 1;
FIG. 4 is a further enlarged cross-sectional view of the resilient
member shown in FIG. 3 in an un-compressed state; and
FIG. 5 is a further enlarged cross-sectional view of the resilient
member shown in FIG. 3 in a compressed state
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1 a portion of a water flush crusher or conical
grinder 10 provided with a sealing arrangement in accordance with
this invention, is shown. The details of conical crushers are generally
known to those involved in the art; conical crushers are disclosed
in commonly assigned U.S. Pat. No. 4967967 issued to Karra et
al on Jun. 9 1987 and commonly assigned U.S. Pat. No. 4478373
issued to Gieschen on Oct. 23 1984.
The crusher 10 includes a mainframe housing 12 having a vertical
cylindrical wall 14 the upper edge of which is provided with a
thickened portion 16 having a frustroconical surface 18 which forms
a ring seat. An adjustment ring 20 is formed with a frustroconical
surface 22 which rests on the frustroconical surface 18. The adjustment
ring 20 is provided with a threaded cylindrical inner surface 24
which engages a threaded surface 26 provided on the cylindrical
outer surface of a crusher bowl 28. The vertical position of the
crusher bowl 28 with respect to the housing 12 may be adjusted by
rotating the crusher bowl 28 and the adjustment ring 20 with respect
to each other. When in a desired position, the crusher bowl 28 is
prevented from turning with respect to the adjustment ring 20 by
a clamping ring 30 and one or more pressure cylinders 32 which
exert a locking force between the two rings.
Supported within and by the crusher bowl 28 is a bowl liner 34.
The bowl liner 34 is clamped to the crusher bowl 28 by a clamping
or securing arrangement including a threaded member 36 and a nut
38 which are rotated with respect to each other to exert a clamping
force between the bowl liner 34 and the bowl 28. That clamping force,
together with the engagement of the lower ends of the bowl liner
34 and the bowl 28 secures the bowl liner 34 to the bowl 28.
A conical head 40 is supported on a portion of the mainframe housing
12 within the bowl liner 34. The conical head is provided with a
detachable liner or mantle 42 which is spaced from the bowl liner
to define a crushing cavity 44. The crushing cavity 44 has a width
46 which is set prior to a crushing operation by adjusting the position
of the crusher bowl 28 with respect to the mainframe housing 12
as previously described.
A material feed hopper 48 is positioned over the conical head 40
and the bowl liner 34 and generally within the bowl 28. The material
feed hopper 48 is formed with a cylindrical vertically extending
wall 50 and a horizontal cylindrical bottom 52. A cylindrical opening
is provided in the bottom 52 with edge 54 of the opening surrounding
an upper edge 56 of the bowl liner. A horizontally extending surface
58 is formed near the upper edge of the bowl liner 34 to support
the bottom 52 of the feed hopper 48 adjacent the edge 54 of the
cylindrical opening. The feed hopper 48 is also provided with a
ring 60 near its upper end, which provides a horizontal surface
62 located above a horizontal surface 64 provided by an outwardly
extending ring 66 formed at the upper edge of bowl 28.
In accordance with a preferred embodiment of this invention, the
material feed hopper 48 is resiliently supported on the bowl liner
34 and the bowl 28. A non-porous resilient member 68 is interposed
between the horizontally extending surface 58 formed near the upper
edge of the bowl liner 34 and the bottom surface of the feed hopper
48 which surrounds the edge 54 of the cylindrical opening. A similar
non-porous resilient member 70 is interposed between the horizontal
surface 62 provided by the ring 60 and the horizontal surface 64
provided by the outwardly extending ring 66 formed at the upper
edge of bowl 28. Not only do the resilient members 68 and 70 support
feed hopper 48 but they also provide, in accordance with a preferred
embodiment of this invention, a sealing arrangement to prevent the
entry of material being crushed into the confined space defined
by the crusher bowl 28 the bowl liner 34 and the hopper 48.
Referring now to FIGS. 2 through 5 the resilient members 68 and
70 will be further described. FIG. 4 represents the shape of the
resilient members 68 and 70 before a compressive force is applied
between their upper and lower surfaces. While FIGS. 4 and 5 could
represent either of the resilient members 68 or 70 since in the
preferred embodiment they have the same cross-sectional shape, numerals
are applied to FIGS. 4 and 5 assuming that they represent resilient
member 68 interposed between the bottom 52 of the hopper 48 and
the horizontal surface 58 formed near the upper edge of bowl liner
34.
The resilient members 68 and 70 are formed with a cross-sectional
shape having a flat top 72 parallel side walls 74 and 76 extending
generally perpendicular from the top 72 and a semicircular base
78. The resilient members 68 and 70 may be manufactured as elongated
extrusions, with lengths being cut and the ends joined to form rings.
A circular hole 80 is formed in the extrusion adjacent the semicircular
base 78 to increase the resiliency of the member, such that said
semicircular base is flattened by the weight of the hopper 48 to
deform the hole to an oval shape as shown in FIG. 5.
In assembling a crusher with a sealing arrangement in accordance
with this invention, the flat top 72 of the resilient members 68
and 70 is secured to the hopper by a suitable adhesive, which also
served to provide a seal between the resilient members and the hopper.
The flattening of the semicircular base 78 as shown in FIGS. 2
3 and 5 serves to provide an enlarged sealing area between the
resilient members 68 and 70 and the bowl liner 34 and the bowl 28
respectively.
To protect the non-porous resilient member 68 interposed between
the bottom 52 of the hopper 48 and the bowl liner 34 the horizontal
surface 58 formed on bowl liner 34 is located below the top surface
56 of an upwardly extending lip 82 formed at the inner edge of the
top of the bowl liner 34 such that the ridge or lip 82 of the bowl
liner extending above the horizontal surface 58 serves to protect
the resilient member from continuing flowing contact with the material
and fluid passing through the hole in the bottom 52 of the hopper
48 to the crushing cavity 44. The inner circular surface of the
lip 82 is formed as a continuation of the inner surface of the bowl
liner 34. While a narrow circular space between the outer surface
of the lip 82 of the bowl liner and the edge 54 of the hole in the
bottom 52 of the hopper 48 may permit some fine material and liquid
to reach the resilient member 68 the liquid and material will be
stagnant, and thus will not cause abrasive wear of the resilient
member. The top surface 56 of the upwardly extending lip is formed
to be essentially level with or slightly below the top surface of
the bottom 52 of the hopper, such that material and liquids readily
flow over the lip and into the crusher cavity, and are not directed
into the narrow circular space which may be formed between the outer
surface of the lip 82 of the bowl liner and the edge 54 of the hole
in the bottom 52 of the hopper 48.
Lip 82 of bowl liner 34 preferably has a width of approximately
50% (e.g., 57%) of the general width of liner 34. The general width
of liner 34 is preferably measured at a vertical section 57 of liner
34. The relatively small width of lip 82 reduces the amount of material
for liner 34 and yet provides significant protection for member
68. Lip 82 extends approximately the same distance above surface
58 as the general width of liner 34. Ring 52 and ring 60 can include
a ridge or groove for receiving member 68 and member 70 respectively.
Thus, the protection arrangement of this invention prevents materials
and liquids introduced into the hopper 48 from continuously flowing
by and abrading and wearing the components of the sealing system
between the bowl liner 34 and hopper 48.
While a single embodiment of the invention has been shown, it should
be apparent to those skilled in the art that what has been described
is considered at present to be the preferred embodiment of this
invention. In accordance with the Patent Statute, changes may be
made in the protection arrangement for a sealing system in a conical
crusher between a hopper and a bowl liner without actually departing
from the true spirit and scope of this invention. The appended claims
are intended to cover all such changes and modification which fall
in the true spirit and scope of this invention. |