Gyratory crusher and slide bearing lining

Patent metadata

Field	Value
Publication number	US-10493459-B2
Application number	US-201314417348-A
Country	US
Kind code	B2
Filing date	Jun 19, 2013
Priority date	Jul 27, 2012
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A gyratory crusher includes an eccentric having an inner slide bearing surface and an outer slide bearing surface, the inner slide bearing surface defining, together with an opposing slide bearing surface, an inner slide bearing. The outer slide bearing surface defines, together with another opposing slide bearing surface, an outer slide bearing. The eccentric is rotatably connected to a crusher frame so as to allow a rotation about an eccentric axis of rotation, which is fixed relative to the frame. The eccentric axis of rotation is defined by one of the inner and outer slide bearings. The inner slide bearing has a total height-to-diameter quotient (H1/D1) of less than 1.0.

First claim

The invention claimed is:

1. A gyratory crusher comprising:
a crushing head on which a first crushing shell is mounted, the crushing head being mounted on a crushing head shaft which is arranged in a top spider;
a frame on which a second crushing shell is mounted, the second crushing shell defining, together with the first crushing shell, a crushing gap; and
an eccentric having an inner slide bearing surface and an outer slide bearing surface, the inner slide bearing surface defining, together with an opposing slide bearing surface, an inner slide bearing, and the outer slide bearing surface defining, together with another opposing slide bearing surface, an outer slide bearing, the eccentric being rotatably connected to the frame so as to allow a rotation about an eccentric axis of rotation relative to the frame, the eccentric axis of rotation being defined by one of said inner and outer slide bearings, the inner slide bearing having an inner bearing lining and the outer slide bearing having an outer bearing lining both arranged on the eccentric, the crushing head being rotatably connected to the eccentric so as to allow a rotation about a crushing head axis relative to said eccentric, the crushing head axis of rotation being defined by the other of said inner and outer slide bearings, wherein the crushing head is arranged to, when the crusher is operated, execute a gyratory movement about the eccentric axis for crushing of material that is introduced in the crushing gap, the crusher having a single respective inner and outer slide bearing each having a diameter (D 1 , D 2 ) and a total axial height (H 1 , H 2 ) defined respectively by an axially upper end and an axially lower end, the inner and outer slide bearings having each a respective single continuous slide bearing surface or several vertically separated slide bearing surface portions that form part of an aggregate slide bearing surface, each of the single slide bearing surface or the aggregate slide bearing surface being defined between the axial upper and lower ends, and having a total height-to-diameter quotient (H 1 /D 1 ) of less than 1.0 and larger than 0.35 and a total axial height to diameter (H 2 /D 2 ) being less than 0.5 and larger than 0.15.

2. The gyratory crusher according to claim 1 , wherein the crushing head is vertically slidable relative to the frame so as to allow changing the width of the crushing gap, wherein a quotient (HL/D) between the maximum vertical travel length (HL) of the crushing head and the horizontal diameter (D) of the crushing head exceeds 0.16.

3. The gyratory crusher according to claim 1 , wherein the eccentric axis of rotation is defined by the outer slide bearing, and the crushing head axis of rotation is defined by the inner slide bearing.

4. The gyratory crusher according to claim 1 , further comprising a hydraulically movable crushing head shaft piston supporting a crushing head shaft on which the crushing head is mounted.

5. The gyratory crusher according to claim 4 , wherein at least one of the inner and outer slide bearings is at least partly arranged inside an interior cavity of the crushing head shaft piston.

6. The gyratory crusher according to claim 4 , wherein the inner and outer slide bearings are both at least partly arranged inside an interior cavity of the crushing head shaft piston.

7. The gyratory crusher according to claim 1 , wherein at least one of the inner and outer slide bearings includes at least one lubricant supply groove.

8. The gyratory crusher according to claim 7 , wherein the groove separates the at least one slide bearing into at least a first portion and a second portion.

9. The gyratory crusher according to claim 1 , wherein at least one of the inner and outer slide bearings includes a first portion having a first diameter, and a second portion having a second diameter, which is smaller than the first diameter.

10. The gyratory crusher according to claim 1 , wherein the eccentric is at least partly made from a material that is the same as a material of the bearing, the eccentric forming part of at least one of the inner and outer bearings.

11. The gyratory crusher of claim 1 , wherein each of the inner and outer slide bearings has a relative clearance, the inner slide bearing lining having a non-uniform thickness so as to define a circular-cylindrical inner surface, which is eccentric with respect to a circular-cylindrical outer surface, and wherein the inner and/or outer slide bearings having a diametral clearance between the respective inner and opposing slide bearing surfaces and the outer and opposing slide bearing surfaces, the diametral clearance being defined as the diameter (D 1 , D 2 ) of the respective inner and outer slide bearings multiplied by the relative clearance, which is between 2*10 −4 and 5*10 −3 .

12. A gyratory crusher comprising
a crushing head on which a first crushing shell is mounted, the crushing head being mounted on a crushing head shaft which is arranged in a top spider;
a frame on which a second crushing shell is mounted, the second crushing shell defining, together with the first crushing shell, a crushing gap;
an eccentric to which a crushing head shaft, on which the crushing head is mounted, is rotatably connected, the crushing head thereby being arranged to, when the crusher is operated, execute a gyratory movement for crushing material that is introduced in the crushing gap;
an inner slide bearing arranged between the eccentric and the crushing head shaft;
a hydraulically movable crushing head shaft piston supporting the crushing head shaft, the crushing head shaft piston having an interior cavity;
an outer slide bearing arranged between the eccentric and the crushing head shaft piston to allow the eccentric to rotate relative to the crushing head shaft piston, wherein the inner and outer slide bearings are both arranged, at least partly, inside the interior cavity of the crushing head shaft piston; and
an inner bearing lining of the inner slide bearing and an outer bearing lining of the outer slide bearing both being arranged on the eccentric, the inner and outer slide bearings each having a diameter (D 1 , D 2 ) and a total axial height (H 1 , H 2 ) defined respectively by an axially upper end and an axially lower end, the inner and outer slide bearings having each a respective single continuous slide bearing surface or several vertically separated slide bearing surface portions that form part of an aggregate slide bearing surface, each of the single slide bearing surface or the aggregate slide bearing surface being defined between the axial upper and lower ends, and having a total height-to-diameter quotient (H 1 /D 1 ) of less than 1.0 and larger than 0.35 and a total axial height to diameter (H 2 /D 2 ) being less than 0.5 and larger than 0.15.

13. The gyratory crusher of claim 12 , wherein each of the inner and outer slide bearings has a relative clearance, the inner slide bearing lining having a non-uniform thickness so as to define a circular-cylindrical inner surface, which is eccentric with respect to a circular-cylindrical outer surface, and wherein the inner and/or outer slide bearings having a diametral clearance between a respective inner and opposing slide bearing surfaces and a the outer and opposing slide bearing surfaces, the diametral clearance being defined as the diameter (D 1 , D 2 ) of the respective inner and outer slide bearings multiplied by the relative clearance, which is between 2*10 −4 and 5*10 −3 .

Assignees

• Sandvik Intellectual Property

Inventors

• Aberg Niklas
• Johansson Jan
• Malmqvist Patric
• Svensson Arvid

Classifications

• B02C2/06

  and with top bearing {(B02C2/042 takes precedence)} · CPC title

• B02C2/04 Primary

  with vertical axis · CPC title

• B02C2/047 Primary

  and with head adjusting or controlling mechanisms (B02C2/042, B02C2/06 take precedence) · CPC title

• B02C2/00

  Crushing or disintegrating by gyratory or cone crushers {(with non-coaxial discs with intersecting axes B02C7/005)} · CPC title

• F16C33/06

  Sliding surface mainly made of metal (F16C33/24 - F16C33/28 take precedence; {casting metal bearing surfaces B22D15/02, B22D19/08}) · CPC title