This application is the U.S. national stage application of International Application PCT/FI2016/050116, filed Feb. 24, 2016, which international application was published on Aug. 31, 2017, as International Publication WO 2017/144765 A1 in the English language.
The invention generally relates to a gyratory crusher. In particular, but not exclusively, the invention relates to an anti-spin arrangement for a gyratory crusher.
Mineral material, such as stone, is retrieved to be processed from the ground either by exploding or by digging. The mineral material may also comprise natural stone, gravel and construction waste. Both mobile and fixed plants are used for processing. The material to be processed is fed with e.g. an excavator or a wheel loader into a feed hopper of the processing plant, from where the material is forwarded to be processed.
In a gyratory crusher, undesired spinning of the crusher head is a commonly occurring problem in some situations, especially when the crusher is idling, i.e. there is no material in the crushing chamber between crushing shells. Accordingly, an anti spin element is used. Previously the seal of the top bearing of the crusher has functioned as an anti-spin element as well.
While the previous solution reduces spinning, the sealing of the top bearing has been less than optimal, since the required anti-spin characteristics have limited the material and adjustment of the seal. Furthermore, such an integrated anti-spin seal has been difficult to install.
The objective of the invention is to provide an anti-spin arrangement for a gyratory crusher that mitigates the problems of the prior art.
According to a first aspect of the invention there is provided an anti-spin arrangement for a gyratory crusher, comprising
The at least one seal element may comprise a first seal element and a second seal element.
The anti-spin arrangement may further comprise a wiper element.
The at least one anti-spin element may comprise two or more anti-spin elements.
The at least one seal element, the at least one anti-spin element and the first and second adjustment element may have a ringlike form.
The at least one anti-spin element may comprise perforations, grooves, ridges or folds.
The first and/or second adjusting element may have a substantially L-shaped cross-section.
The first and/or the second adjustment element may comprise a plurality of separate parts.
According to a second aspect of the invention there is provided a gyratory crusher comprising
The gyratory crusher may further comprise a cover element detachably attached to the upper frame and configured to hold the anti-spin arrangement in place.
According to a third aspect of the invention there is provided a mineral material processing plant comprising a crusher according to the second aspect.
The mineral material processing plant may comprise a mobile plant.
According to a fourth aspect of the invention there is provided a method of adjusting an anti-spin arrangement of a gyratory crusher, comprising
The adjusting the at least one seal element and/or the at least one anti-spin element may comprise
Different embodiments of the present invention will be illustrated or have been illustrated only in connection with some aspects of the invention. A skilled person appreciates that any embodiment of an aspect of the invention may apply to the same aspect of the invention and other aspects
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
In the following description, like numbers denote like elements. It should be appreciated that the illustrated figures are not entirely in scale, and that the figures mainly serve the purpose of illustrating embodiments of the invention.
The first seal element 20 and the first anti-spin element 30 comprise separate elements. In an embodiment, the first seal element 20 and the first anti-spin element 30 have a ringlike for. In an embodiment, the first seal element 20 and the first anti-spin element 30 comprise segments forming a ringlike whole. In an embodiment, the first seal element 20 comprises material such as rubber. In an embodiment, the first anti-spin element 30 comprises material such as rubber. In a further embodiment, the first anti-spin element 30 comprises elements such as perforations, grooves, ridges or folds configured to provide for more sensitive adjustment of the anti-spin effect of the first anti-spin element 30. In an embodiment, the first seal element 20 and the first anti-spin element comprise segments and form-locking means configured to lock the segments together so as to form for example a ringlike element.
The first adjustment element 60 and the second adjustment element 70 in an embodiment comprise ringlike elements. In a further embodiment, the first adjusting element 60 and the second adjusting element 70 have an L-shaped cross section in such a way that they reside both around and below or above the respective seal and/or anti-spin element. In a further embodiment, the first 60 and second 70 adjustment element have an L-shaped cross section in such a way that they reside around the respective seal and or anti spin element. Horizontal part of the L-shaped cross section is in an embodiment used to adjust sealing and/or anti-spin effect and vertical part of the L-shaped cross section is in an embodiment used in limiting the effect.
When the cover element 40 is tensioned in place e.g. by bolts against the upper frame 90, as illustrated for example in
The first 60 and second 70 adjustment element in an embodiment comprise segments forming a ringlike whole or comprise separate elements positioned around the periphery of the respective seal and/or anti-spin element. In a further embodiment, the first 60 and/or second 70 adjusting element comprise a plurality of separate parts either around the periphery in a single layer or in several layers. The number and/or thickness and/or tightness of the first 60 and second 70 adjustment element in an embodiment is adjusted in order to adjust the sealing and/or anti-spin effect, i.e. the adjustment elements press the respective seal and/or anti-spin element against or around the main shaft 50. The first 60 and second 70 adjustment element in an embodiment comprise substantially rigid material such as metal. In an embodiment, the first seal element 60 and the second seal element 70 comprise segments and form-locking means configured to lock the segments together so as to form for example a ringlike element.
Furthermore,
Further,
Hereinbefore embodiments of the invention have been described with reference to
The material to be crushed is in an example embodiment fed to the feeder 410 and therefrom by the conveyor 411 to the crusher 100. The feeder 410 may also be a so-called scalper feeder. The material to be crushed coming from the conveyor is directed to the feed opening 421. In a further example embodiment, the material to be crushed is fed to the feed opening directly, for example by a loader.
The skilled person appreciates that the mineral material processing plant 400 can, in a further example embodiment, be a stationary mineral material processing plant comprising crushing, screening and conveying units. In a further example embodiment, the mobile processing plant may, instead of tracks depicted in
In an embodiment, the adjusting is carried out by first detaching the cover element 40 and then lowering the at least one seal element 20,25 and/or the at least one anti-spin element 30 from between the upper frame and the main shaft, so that the can be accessed without dismantling the upper frame 90. Then the at least one seal element 20,25 and/or the at least one anti-spin element 30 and/or a first adjustment element 60 and a second adjustment element 70 is replaced should they require replacement and or the arrangement is adjusted by adjusting with the first adjustment element 60 and the second adjustment element 70 respectively. After the adjustment and/or replacement of parts has been carried out, the at least one seal element 20,25 and/or the at least one anti-spin element 30 are again raised in the position between an upper frame 90 and a main shaft 50 and the cover element 40 is attached.
The transmission 607 is arranged to rotate the eccentric assembly 604 around the main shaft 50 producing gyratory movement between the inner 606 and the outer 605 crushing parts.
The top bearing 10 is preferably substantially cylinder shaped between the upper frame 90 and the main shaft, allowing the main shaft to move up and down in relation to the top bearing 10 when for example setting of the crusher is adjusted by the adjusting piston 603.
Without in any way limiting the scope of protection, interpretation or possible applications of the invention, a technical advantage of different embodiments of the invention may be considered to be an improved sealing and anti-spin effect. Further, a technical advantage of different embodiments of the invention may be considered to be individually adjustable sealing and anti-spin effect without compromising either. Still further, a technical advantage of different embodiments of the invention may be considered to be easier replacement and installation of the anti-spin and/or sealing. Still further, a technical advantage of different embodiments of the invention may be considered to be reduced wear of the sealing and anti-spin elements. Still further, a technical advantage of different embodiments of the invention may be considered to be replacement and/or adjustments of the elements of the sealing and anti-spin arrangement without dismantling the upper frame of the crusher.
The foregoing description provides non-limiting examples of some embodiments of the invention. It is clear to a person skilled in the art that the invention is not restricted to details presented, but that the invention can be implemented in other equivalent means. Some of the features of the above-disclosed embodiments may be used to advantage without the use of other features.
As such, the foregoing description shall be considered as merely illustrative of the principles of the invention, and not in limitation thereof. Hence, the scope of the invention is only restricted by the appended patent claims.
Filing Document | Filing Date | Country | Kind |
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PCT/FI2016/050116 | 2/24/2016 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2017/144765 | 8/31/2017 | WO | A |
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Number | Date | Country | |
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20190105657 A1 | Apr 2019 | US |