US 4,378,911 A · Cage mill

Abstract

An improved design for a cage mill for disintegrating or reducing materials such as ore, grain, etc., consisting of a movable and a stationary portion for housing two cooperative rotatable cage assemblies mounted on coaxial shafts, and each having two rows of impact members alternating with those of the other cage assembly. The axial length of the impact members increases radially outwardly from the axis of the two shafts, and a disk for each cage assembly has a stepped portion for mounting the longer row of impact members and the ends of the members are protected by impact rings. The stepped portion provides an offset area for nesting the ring of a preceding row to protect the ring against abrasion. For each cage assembly a tapered split ring nut arrangement at the end of the shaft forces the cage against a hub rigidly secured to the shaft, and a locking means secures the nut to the shaft. The power means for rotating the cage assembly associated with the movable portion is mounted on the movable portion for movement therewith, and the sealing element between the movable and stationary portions of the housing is designed to always maintain a positive sealing condition yet allow for misalignment of the two portions.

Claims21

Dependent claims

In a cage mill for disintegrating or reducing material comprising:

a housing forming a material reducing chamber,
two axially opposed shafts each having their one end extended in said chamber,
each said shaft includes a hub having a bore for mounting on a complimentary portion of said extended end,
cooperating cage assemblies connected to and for rotation with a different one of said hubs,
means for maintaining each said hub and its respective cage assembly on their respective shaft comprising:
a split ring arranged concentrically with said extended end portion of said shaft and having inner peripheral and outer peripheral load transmitting surfaces, said latter surfaces engaging with an associated cage assembly in a manner to oppose movement of the hub axially towards the end of the shaft,
a nut threadably mounted on the outer end of said shaft having an outer peripheral load transmitting surface for engaging said inner surface of said split ring in a manner to oppose movement of the ring axially toward the end of the shaft,
said nut having a central opening including a restricting surface,
locking means threadably insertable through said opening of said nut into the end of said shaft having a holding member which said nut in the tendency to rotate is caused to engage to prevent rotation thereof.

6 more elements

In a cage mill for disintegrating or reducing materials comprising:

a housing of a unitized construction being made up of two distinct portions which when caused to assume an operative position for said mill, form said unitized construction,
said housing also having within it a material reducing chamber for receiving rotating means for reducing said material when introduced into said chamber,
said two distinct portions consisting of one portion being stationarily mounted and the other portion being movably mounted relative to each other,
power means for rotating said rotating means mounted on said movable portion and movable therewith,
retracting means including a second power means mounted in said movable portion and movable with said movable portion for causing said movable portion to move toward and away from said stationary portion and wherein said towards position assumes said operative postion of said mill,
base means forming part of said stationary portion of said housing for supporting said movable portion of said housing during its movement,
said housing includes two axially opposed shafts each having their one end extending in said chamber,
each said shaft including a hub having a bore for mounting on a complimentary portion of said extended end,
said rotating means connected to and for rotation with a different one of said hubs,
means for maintaining each said hub and its respective rotating means on their respective shaft comprising:
a split ring arranged concentrically with said extended end portion of said shaft and having inner peripheral and outer peripheral load transmitting surfaces, said latter surface engaging with an associated rotating means in a manner to oppose movement of the hub axially towards the end of the shaft, and
means for engaging said inner surface of said split ring to secure said ring against said hub.

9 more elements

In a cage mill for disintegrating or reducing materials, comprising:

a housing of a unitized construction being made up of two distinct portions which when caused to assume an operative position for said mill form said unitized construction,
said housing also having within it a material reducing chamber for receiving rotating means for reducing said material when introduced into said chamber,
said two distinct portions consisting of one portion being stationarily mounted and the other portion being movably mounted relative to the stationary portion,
cooperative opposed members, one mounted on said stationary portion and one on said movable portion to form a seal holding assembly externally of said chamber when said portions assume said operative position and when in said operative position said opposed members are in a cooperative spaced apart position,
said rotating means consisting of at least two separate cooperating material reducing assemblies each supported on coaxially arranged shafts carried by a different one of said portions, and wherein for the operation of said rotating means, a predetermined axially spaced relationship exists between said two shafts,
sealing means extending substantially the entire length of said members constructed and arranged to be received and maintained in a proper sealing position by said seal holding assembly of said portions,
said sealing means further comprises;
a pliable gasket means mounted on one of said members and having an exposed relatively wide deformable surface, and
lip means mounted on the other of said members arranged perpendicular to said deformable surface of said gasket means and constructed and arranged to compress said gasket thereby establishing a sealing condition,
said lip extending in the direction of said movable portion,
said surface of said seal engaged by said lip being arranged and having a surface area large enough to allow engagement of said lip when said portions are in alignment and when said portions are out of alignment relative to each other,
said seal holding assembly further including a projection means mounted radially outwardly from said lip on one of said members and having a cross-sectional length greater than that of said lip,
said projection means extending parallel to said lip for limiting the positioning of said lip within said gasket and for maintaining said space relationship between said shafts, and when said opposed members are in said cooperative spaced apart position, said projection means is further constructed and arranged to cooperate with said opposed members to enclose said sealing means,
clamping means for maintaining said gasket means and said lip means in said sealing condition.

11 more elements

In a cage mill for disintegrating or reducing material comprising:

a housing forming a material reducing chamber having a constant cross-sectional width,
two axially opposed shafts each having their one end extended in said chamber,
cooperative cage assemblies connected to and for rotation with a different one of said shafts and forming a center for receiving said material,
each cage assembly comprising the following:
at least two concentric rows of impact members arranged to extend across said cross-sectional width of said chamber,
a stepped disk for supporting two rows of associated impact members at their one end and constructed and arranged in a manner to mount said rows of said impact members in radial different portions of a step,
said impact members of a first row having a lesser length than those of a second row arranged radially outwardly from said first row and certain impact members being arranged to overlay such that a nested relationship is formed, and are protected by the axially parallel portion of said stepped disk,
means for each row for supporting the other end of said impact members,
the construction and arrangement of said two cooperative cage assemblies being such that said two rows of a cage assembly alternate with said two rows of the other cage assembly, and all of said rows define a substantially increasing tapering path of travel for said material outwardly from said center,
said shafts being supported at the other ends outside said housing on support means and said support means of at least one of said shafts including:
a first adjusting means for axially moving said one shaft and its respective cage assembly relative to the other cage assembly for obtaining an operative and an inoperative positioning for said cage assemblies, and
a second adjusting means associated with at least one of said shafts for axially moving said at least one shaft and its respective cage assembly when said cage assemblies are in said operative positioning and constructed and arranged to further position said cage assemblies relative to each other to obtain a desired said nesting relationship therebetween,
said second adjusting means includes:
a plate supported by a part of said support means in a manner to permit movement of said plate axially of said one shaft,
shaft carrying means for said one shaft carried by said plate so that said plate and said one shaft move together as a unit, and
means for effecting said movement.

13 more elements

In a cage mill for disintegrating or reducing materials comprising:

a housing of a unitized construction being made up of two distinct portions which when caused to assume an operative position for said mill, form said unitized construction,
said housing also having within it a material reducing chamber for receiving rotating means for reducing said material when introduced into said chamber,
said two distinct portions consisting of one portion being stationarily mounted and the other portion being movably mounted relative to each other,
power means for rotating said rotating means mounted on said movable portion and movable therewith,
retracting means including a second power means mounted in said movable portion and movable with said movable portion for causing said movable portion to move toward and away from said stationary portion and wherein said towards position assumes said operative position of said mill,
base means forming part of said stationary portion of said housing for supporting said movable portion of said housing during its movement,
said housing includes two axially opposed shafts each having their one end extending in said chamber,
each said shaft including a hub having a bore for mounting on a complimentary portion of said extended end,
said rotating means connected to and for rotation with a different one of said hubs,
means for maintaining each said hub and its respective rotating means on their respective shaft comprising:
a split ring arranged concentrically with said extended end portion of said shaft and having inner peripheral and outer peripheral load transmitting surfaces, said latter surfaces engaging with an associated rotating means in a manner to oppose movement of the hub axially towards the end of the shaft,
a nut threadably mounted on the outer end of said shaft having an outer peripheral load transmitting surface for engaging said inner surface of said split ring in a manner to oppose movement of the ring axially toward the end of the shaft,
said nut having a central opening including a restricting surface,
locking means threadably insertable through said opening of said nut into the end of said shaft having a holding member which said nut in the tendency to rotate is caused to engage to prevent rotation thereof.

11 more elements

Dependencies are inferred from the claim text.

Cage mill

Life of this patent

Cage mill

Life of this patent

Abstract

Claims21