System for positioning the rotor and indexing a percussive comminutor
The rotor ( 2 ) being operatively associated with an indexing member ( 13 ) in the form of a prism, coaxial and secured in rotation with the rotor, said indexing member having a number of projecting edges equal to the number of beaters ( 3 ), the indexing member being positioned on the axis of the rotor such that the application of the indexing plate ( 25 ) against the surface of the indexing member causes a rotation of the rotor ( 2 ) to a position in which one of the beaters is located at a position of maximum approach with the impact baffle ( 5 ), wherein approach of said baffle ( 5 ) into contact with the end of said beater ( 3 ) defines an origin of adjustment of the spacing ® between said baffle and said beater and thus the adjustment of said spacing for the desired granulometry.
1. An indexing system for a percussive comminutor, the system comprising:
a comminuting chamber,
a rotor having beaters regularly spaced about a periphery of the rotor,
at least one impact baffle, of which one end is pivoted and another end is movable toward or away from the rotor by operation of an adjustment jack, the baffle defining at the point of closest approach with the radial end of one of the beaters a spacing (R) which determines a given granulometry,
the rotor being operatively associated with an indexing member ( 13 ) in the form of a prism, coaxial and secured in rotation with the rotor, said indexing member having a number of projecting edges equal to the number of beaters ( 3 ),
an indexing jack ( 14 ) having a rod with an indexing plate ( 15 ) that is mounted on an end of the rod and that is movable into contact with a surface of the indexing member,
the indexing member being positioned on the axis of the rotor such that application of the indexing plate ( 15 ) against the surface of the indexing member causes a rotation of the rotor ( 2 ) to a position in which one of the beaters is located at a position of maximum approach with the impact baffle ( 5 ), wherein approach of said baffle ( 5 ) into contact with the end of said beater ( 3 ) defines an origin of adjustment of the spacing (R) between said baffle and said beater and thus the adjustment of said spacing for the desired granulometry.
2. The indexing system according to claim 1 , wherein the indexing member ( 13 ) is square.
3. The indexing system according to claim 1 , wherein the indexing member ( 13 ) is hexagonal.
4. The indexing system according to claim 1 , wherein the indexing member ( 13 ) is star-shaped.
5. The indexing system according to claim 4 , wherein the indexing member comprises plural legs and the indexing plate ( 15 ) comprises a finger ( 21 ) that is separate from the rod of the indexing jack and that is arranged to push one of the plural legs to cause the rotor ( 2 ) to turn.
6. The indexing system according to claim 1 , wherein the indexing jack ( 14 ) is provided with a guide stirrup ( 18 ) that is secured to the rod and parallel to the rod, and that is slideable in a guide sleeve ( 19 ), so as to prevent rotation of the rod of the jack during operation.
7. The indexing system according to claim 2 , wherein the indexing jack ( 14 ) is provided with a guide stirrup ( 18 ) that is secured to the rod and parallel to the rod, and that is slideable in a guide sleeve ( 19 ), so as to prevent rotation of the rod of the jack during operation.
8. The indexing system according to claim 3 , wherein the indexing jack ( 14 ) is provided with a guide stirrup ( 18 ) that is secured to the rod and parallel to the rod, and that is slideable in a guide sleeve ( 19 ), so as to prevent rotation of the rod of the jack during operation.
9. The indexing system according to claim 4 , wherein the indexing jack ( 14 ) is provided with a guide stirrup ( 18 ) that is secured to the rod and parallel to the rod, and that is slideable in a guide sleeve ( 19 ), so as to prevent rotation of the rod of the jack during operation.
10. The indexing system according to claim 5 , wherein the indexing jack ( 14 ) is provided with a guide stirrup ( 18 ) that is secured to the rod and parallel to the rod, and that is slideable in a guide sleeve ( 19 ), so as to prevent rotation of the rod of the jack during operation.
11. The indexing system according to claim 1 , wherein said rotor is round and said indexing member is one of a polygon and star-shaped and is interior to said beaters.
12. An indexing system for a percussive comminutor, the system comprising:
a rotor having plural beaters regularly spaced about a periphery of said rotor;
an impact baffle that has one pivoted end and an opposite end that is movable relative to said rotor, a point of closest approach of said opposite end of said impact baffle to said beaters defining a spacing that determines a granulometry for the comminutor;
said rotor carrying interior to said beaters an indexing member with a number of sides equal to a number of said beaters, said indexing member rotating with said rotor; and
an indexing jack movably carrying an indexing plate, said indexing plate being movable into contact with one of said sides of said indexing member when said rotor has stopped rotating to cause said rotor to rotate further into a position where one of said beaters is at the point of closest approach to said opposite end of said impact baffle.
13. The indexing system of claim 12 , wherein said rotor is round and said indexing member is one of a polygon and star-shaped.