The present invention relates to cylinder rolls used in processing machines in the pulp, paper, textile and plastic industries for example. More specifically but not exclusively, the present invention is concerned with an apparatus and method for balancing a cylinder roll.
Cylinder rolls used in processing machines, such as drying cylinders used in the pulp and paper industry as well as other devices used in the textile and plastic industries become oval during rotation. The foregoing is known as the whip effect. This problem is aggravated when rotational speed is increased. Various systems have intended to overcome this problem by balancing the cylinder rolls so as to avoid this deformation.
Some improved systems have provided annular rails within the body of the cylinder roll, fixed to the inner face thereof with a balance weight being attached to the rails.
A drawback of known systems is that they do not provide for the weight to be easily adjusted. A drawback of known systems is that annular devices are fastened to the inner faces of the cylinder tubes.
An object of the present invention is to provide an apparatus for balancing a cylinder roll
An object of the present invention is to provide a cylinder roll.
An object of the present invention is to provide a method for balancing a cylinder roll.
In accordance with an aspect of the present invention, there is provided an apparatus for balancing a rotatable tubular cylinder roll having an inner annular face, the apparatus comprising:
an annular body for being positioned within the cylinder roll and defining inner and outer faces, the outer face engaging the cylinder inner annular face; and
weight receiving elements disposed on the inner face of the annular body for receiving balance weights,
wherein when the apparatus is mounted to the cylinder roll, the balance weights can be selectively and removably mounted thereto for balancing the cylinder roll during rotation thereof.
In an embodiment, the annular body is outwardly biased thereby providing the outer face to sealingly engage the cylinder inner annular face. In an embodiment, the size of the annular body is selectively modifiable. In an embodiment, the annular body size is modifiable by an adjustment assembly mounted thereto. In an embodiment, the annular body size is modifiable between one position where it sealingly engages the cylinder inner annular face and another position where it disengages the cylinder inner annular face. In an embodiment, the annular body comprises a pair of adjacent free ends. In an embodiment, an adjustable fastening assembly is fastened to the adjacent free ends for adjusting the distance between the free ends for selectively modifying the size of the annular body.
In an embodiment, the weight receiving elements and the balance weights comprise mutual fasteners. In an embodiment, the weight receiving elements comprise tubes, the balance weights comprise rods, the tubes comprising an open end for receiving a respective rod, the tube comprising a removable cap at an opposite end thereof, the cap comprising a fastener to fastened to fastener receiving element at a longitudinal end of the rod adjacent the cap.
In accordance with an aspect of the present invention, there is provided a rotatable tubular cylinder roll comprising:
an inner annular face; and
weight receiving tubes disposed on the inner face of the annular body for receiving balance weights,
wherein balance weights are selectively and removably mounted to the weight receiving tubes for balancing the cylinder roll during rotation thereof.
In accordance with an aspect of the present invention, there is provided a rotatable tubular cylinder roll comprising:
an inner annular face;
an apparatus for balancing a rotatable tubular cylinder roll having an inner annular face, the apparatus comprising:
an annular body mounted within the cylinder roll and defining inner and outer faces, the outer face engaging the cylinder inner annular face; and weight receiving elements disposed on the inner face of the annular body for receiving balance weights,
wherein the balance weights are selectively and removably mounted to the apparatus for balancing the cylinder roll during rotation thereof.
In accordance with the present invention, there is provided a method for balancing a cylinder roll, the method comprising:
providing an outwardly and annularly biased body to securely engage the inner annular face of the cylinder roll; and
mounting balance weights to this body.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of illustrative embodiments thereof given by way of example only with reference to the accompanying drawings.
In the appended drawings, where like reference numerals denote like elements throughout, and where:
a and 2b and 2c are perspective views of the balancing apparatus for cylinder rolls in accordance with a non-limiting illustrative embodiment of the present invention;
c is a perspective view of the balancing apparatus for cylinder rolls in accordance with another non-limiting illustrative embodiment of the present invention;
Generally stated the invention provides, in one embodiment thereof, an apparatus that includes an annular band for being fitted within a cylinder roll. The annular band is cut thereby forming two adjacent free ends and is outwardly biased. The outer face of the annular band engages the inner face of the cylinder roll and the tension of the outwardly biasing force maintains it in place. The adjacent free ends are attached via an adjustable fastening assembly so as to adjust the size of the annular band. The inner face of the annular band includes with weight receiving elements for removable receiving balance weights.
With reference to the associated drawings embodiments of the present invention will now be described.
a,
2
b and 2C show a weight balancing apparatus 10 for cylinder roll 12, shown in
Turning back to
The inner surface 20 includes a plurality of weight receiving elements, generally denoted 30. In the illustrated example, the weight receiving elements are hollow tubes extending the full length the band 16 and protruding from the first and second sides 22 and 24. Again, in this example there are eight weight receiving tubes 30, more particularly and as shown in
As shown in
With reference to
The annular band 16 includes aligned openings 50 on its outer face 18 which are useful for welding the tubes 30 the inner surface 20. Of course, the tubes 30 can be mounted to the inner surface by other methods that the skilled artisan can contemplate within the scope of the present invention.
The annular band 16 has a cut 52, defining the adjacent free ends 26 and 28, and is so designed as to be outwardly biased. As such, the free ends 26 and 28 are fastened together via an adjustable fastening assembly 54. More specifically, the free ends 26 and 28 include respective bracket elements 56 (having receiving apertures 58 for receiving the fastening assembly 60. The fastening assembly 60 comprises a pair of bolts 62 (see
The annular band 16 also includes a spine member 66 at its inner face 20 and opposite the cut 52. This spine member 66 provides stability to the band 16 against tension force for example.
With reference to
In one embodiment, only one apparatus 10 is mounted to the 10 inner face of the cylinder roll 12. In one embodiment, the balance weights 38 can span the length of the cylinder roll 12.
In another embodiment, a plurality of apparatuses 10 is mounted to the inner face 13 of a cylinder roll 12. The balance weights 38 can span the length of the cylinder roll 12 and as such run from the tube 30 of one apparatus 10 to the corresponding tube 30 of the next apparatus and so on. Of course, the balance weights 38 can run trough a series of apparatus 10 that do not span the whole length of the cylinder roll 12. In another embodiment, each apparatus 10 has its own balance weights 38 that are fitted within its own receiving tubes 30.
The balancing apparatuses of the present invention provide for bringing the centre of gravity of the cylinder roll closer to its axis of rotation by positioning the balance weights 38 within the weight receiving elements 30.
It is to be understood that the invention is not limited in its application to the details of construction and parts illustrated in the accompanying drawings and described hereinabove. The invention is capable of other embodiments and of being practised in various ways. It is also to be understood that the phraseology or terminology used herein is for the purpose of description and not limitation. Hence, although the present invention has been described hereinabove by way of embodiments thereof, it can be modified, without departing from the spirit, scope and nature of the subject invention as defined in the appended claims.
The present application requests priority on U.S. Provisional Application No. 61/136,082 filed on Aug. 11, 2008 and incorporated herein by reference in its entirety.
Number | Date | Country | |
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61136082 | Aug 2008 | US |