CN109999957B

CN109999957B - Multistage vertical crusher

Info

Publication number: CN109999957B
Application number: CN201910171717.5A
Authority: CN
Inventors: 王明国; 孙红勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2021-07-30
Anticipated expiration: 2039-03-07
Also published as: CN109999957A

Abstract

The invention relates to the field of ore crushing machinery, in particular to a multistage vertical crusher, which comprises a casing, a driving motor, a rotor and a middle shaft, wherein the rotor comprises a plurality of rotor layers, each rotor layer is a conical cylinder with equal height, each rotor layer is stacked up and down in sequence, a mounting hole for being fixedly connected with the middle shaft is formed in the center of each rotor layer, the inclination angle of the outer conical surface of the rotor layer positioned at the topmost part is 60 degrees, the inclination angles of the outer conical surfaces of the other rotor layers are sequentially increased from top to bottom by taking 80 degrees as an initial value, the inclination angle of the outer conical surface of each rotor layer is smaller than 90 degrees, and a plurality of hammers are uniformly arranged on the outer conical surface of each rotor layer. The rotor of the crusher adopts a three-dimensional layered design, so that the crusher can crush ores more finely while the later maintenance is facilitated.

Description

Multistage vertical crusher

Technical Field

The invention relates to the field of ore crushing machinery, in particular to a multistage vertical crusher.

Background

In the industrial sectors of metallurgy, chemical industry and the like, a large amount of raw materials are treated each year with mineral breakers, which play an important role in many sectors. For example, in order for a mill to separate useful ore into individual pieces, a mineral breaker must be used to break the ore to the particle size required for the comminution process. The ore crusher crushes the raw materials to increase the surface area of the materials, shorten the chemical reaction time of the materials and achieve better preparation effect. However, the existing ore crusher has the defects of large volume, high energy consumption, uneven crushed particles and the like.

In the prior art, the utility model with publication number CN2319120 discloses an adjustable hammer head fine crusher, which is provided with a pre-crushing device and an adjustable hammer head, wherein the upper part of the pre-crushing device is a centrifugal material spreading disc, the lower part of the pre-crushing device is a material guide plate, and the inclination angle of the material guide plate is 60-85 degrees; the adjustable hammer is provided with 2-6 striking heads with different transverse lengths. The utility model has the defects that: 1. the energy consumption is high, the bearings adopted by the crusher are all common bearings, the preparation quality of the crusher is large, the bearings belong to easily damaged parts, the maintenance and repair are inconvenient, and the energy consumption of the crusher is high; 2. the crusher is easy to damage, continuous collision between the crusher body and ores of the crusher leads to continuous abrasion of the outside of the crusher body when the crusher operates, and the crusher body cannot be protected.

Meanwhile, in the prior art, the utility model with publication number CN205925805U discloses a three-section type crusher body cone crusher, which mainly comprises a feeding device, a crusher body assembly, a movable cone, a vibration damping supporting device and a transmission device. The crusher body assembly consists of an upper crusher body, a middle crusher body and a lower crusher body, and three sections of the crusher bodies are connected by high-strength bolts; the inner side of the middle crusher body is provided with a lining plate with a step-shaped protrusion, and the corresponding position on the movable cone body is provided with a lining plate with a longitudinal groove. The stepped protrusion on the lining plate is an annular stepped protrusion from top to bottom. The shape of the groove of the lining plate with the longitudinal groove is circular arc or trapezoid. The utility model has the defects that: 1. easy to damage: the upper, middle and lower bodies of the crusher have large gravity and are uniformly driven by an external motor, and the service life of a bearing for fixing the crusher body can be greatly shortened by the self gravity of the crusher body and the transverse shearing force between the crusher body and ore when the crusher operates; the upper machine, the middle machine and the lower machine of the crusher are integrally cast, when the crusher operates, the outer part of the crusher body is continuously abraded due to continuous collision between the crusher body and ores, the crusher body cannot be protected, generally, the working cycle of the crusher body is 15 days, and after the crusher body continuously works for 15 days, overhaul is performed, which wastes time and labor; 2. the energy consumption is high: the bearings adopted by the crusher are common bearings, the quality of the crusher is large, the bearings belong to easily damaged parts, the maintenance and repair are not convenient, and the energy consumption of the crusher is high.

Therefore, how to make the crusher body more firm while reducing the energy consumption of the crusher is a first problem to be solved urgently in the prior art.

Disclosure of Invention

In view of the shortcomings of the prior art, the present invention provides a multistage vertical crusher to solve the above problems.

The crusher comprises: the driving motor is vertically arranged on two sides of the machine shell, the middle shaft is arranged in the center of the machine shell and movably connected with the machine shell, the rotor is fixedly welded on the middle shaft, a belt pulley is arranged at the top of the middle shaft, and the driving motor is movably connected with the middle shaft through a belt; the machine shell is a cylindrical barrel body, a top positioning bearing is arranged at the center position of the top of the machine shell, a bottom positioning bearing is arranged at the center position of the bottom side in the machine shell, the middle shaft is movably connected with the machine shell through the top positioning bearing and the bottom positioning bearing, a thrust bearing used for supporting the middle shaft is arranged right below the bottom positioning bearing, and the bottom end face of the middle shaft is hemispherical; the rotor comprises a plurality of rotor layers, each rotor layer is a conical cylinder, each rotor layer is stacked from top to bottom in sequence, a mounting hole for being fixedly connected with the middle shaft is formed in the center of each rotor layer, the inclination angle of the outer conical surface of the rotor layer positioned at the topmost part is 50-70 degrees, the inclination angles of the outer conical surfaces of the rest rotor layers are increased from top to bottom in sequence by taking 80 degrees as an initial value, and the inclination angle of the outer conical surface of each rotor layer is smaller than 90 degrees; a plurality of hammers are uniformly arranged on the outer conical surface of each rotor layer, each hammer is a trapezoidal metal block, three oval grooves which are arranged in a straight line are formed in the middle of each hammer, and a screw hole is formed in the center of the bottom of each oval groove; the outer conical surface of each rotor layer is provided with a square groove for positioning and fixing the hammer head, the left side of the square groove is fixedly welded with at least three reinforcing ribs, the right side of each reinforcing rib is fixedly welded on the same metal plate, and the metal plate is provided with three screw holes and bolts which are arranged in a straight line and are used for being fixedly connected with the hammer head; the size of the hammer head on the same rotor layer is the same, the size of the hammer head on different rotor layers is different, and the size of the hammer head on the rotor layer at the top is larger than that of the hammer head on the rotor layer at the bottom.

Preferably, the rotor includes a first rotor layer, a second rotor layer, a third rotor layer, a fourth rotor layer and a fifth rotor layer stacked in sequence from top to bottom, wherein the heights of the second rotor layer, the third rotor layer, the fourth rotor layer and the fifth rotor layer are equal, the height of the first rotor layer is 1.2-1.5 times the height of the second rotor layer, the height of the third rotor layer, the height of the fourth rotor layer, the height of the fifth rotor layer, the inclination angle of the outer conical surface of the first rotor layer is 60 degrees, the inclination angle of the outer conical surface of the second rotor layer is 80 degrees, the inclination angle of the outer conical surface of the third rotor layer is 82 degrees, the inclination angle of the outer conical surface of the fourth rotor layer is 84 degrees, and the inclination angle of the outer conical surface of the fifth rotor layer is 86 degrees.

Preferably, the height of first rotor layer is 350 millimeters, the height of second rotor layer, third rotor layer, fourth rotor layer and fifth rotor layer is 280 millimeters, the bottom diameter of the outside conical surface of first rotor layer is 1490 millimeters, the bottom diameter of the outside conical surface of second rotor layer is 1550 millimeters, the bottom diameter of the outside conical surface of third rotor layer is 1630 millimeters, the bottom diameter of the outside conical surface of fourth rotor layer is 1670 millimeters, the bottom diameter of the outside conical surface of fifth rotor layer is 1690 millimeters.

The crusher further comprises an oil suspension support, the oil suspension support is arranged right below the middle shaft and used for supporting the middle shaft, the oil suspension support comprises a support plate, a plurality of jackscrews and a hydraulic station, a hemispherical groove is formed in the center of the support plate, and a hemispherical end face at the bottom of the middle shaft is matched with the hemispherical groove; the center of the hemispherical groove is provided with a through hole for supplying oil, the through hole is connected with the hydraulic station through an oil conveying pipe, and four arc-shaped oil passages are uniformly formed in the hemispherical groove from the through hole to the outside; the bottom side of the supporting plate is provided with a plurality of screw holes, and the jackscrews are matched with the screw holes one by one to fix the supporting plate.

Further, the outside of rotor is provided with the rotor backplate, the rotor backplate sets up the right side at the tup, the rotor backplate is used for protecting the rotor layer on tup right side.

Further, the rotor guard plate comprises a top guard plate and a bottom guard plate.

The utility model discloses a rotor layer of top, including top layer backplate, clamping hook, clamping groove, top layer backplate sets up on the outside conical surface of the rotor layer at top the right side of tup, the top layer backplate is fan-shaped circular-arc plate body, the recess is seted up to a terminal surface of top layer backplate, the L shape boss that falls that sets up on the outside conical surface of recess and the rotor layer at top mutually supports, another terminal surface of top layer backplate is the trip that turns over a book downwards, on the outside conical surface of the rotor layer at top the right side fixed position department of falling L shape boss is provided with the indent, one side setting of indent with the L shape boss is fallen to trip complex second, be provided with the briquetting in the indent, the briquetting passes through the bolt fastening in the indent, the briquetting is used for fixing the top layer backplate.

The bottom backplate sets up on the outside conical surface on each rotor layer below the rotor layer at top, the bottom backplate is the trapezoidal plate body, the center of trapezoidal plate body one side transversely is provided with the dovetail arch, the center of the outside conical surface on each rotor layer below the rotor layer at top along radially seted up with the protruding complex dovetail of dovetail, a plurality of the horizontal row of bottom backplate passes through the dovetail is fixed.

Further, the bottom of the supporting plate is provided with an oil cooling loop.

The crusher has the beneficial effects that:

1. the rotor of the crusher adopts a three-dimensional layered design, so that the crusher can crush ores more finely while the later maintenance is facilitated.

2. According to the crusher, the method of combining the thrust bearing with the oil suspension support is adopted in the connection of the middle shaft and the shell of the crusher, so that the energy consumption of the whole crusher is reduced, the structure of the crusher is more stable, and the failure rate is reduced.

3. According to the crusher, the rotor guard plate is additionally arranged on the rotor of the crusher, so that the rotor is effectively protected, and meanwhile, the maintenance cost of the crusher is reduced.

Drawings

FIG. 1 is a schematic view of the crusher of the present invention;

FIG. 2 is a partial sectional view taken along line C of FIG. 1;

FIG. 3 is a partial enlarged view of A shown in FIG. 2;

FIG. 4 is an overall top view of the support plate shown in FIG. 3;

FIG. 5 is a top view of the first rotor layer shown in FIG. 2;

FIG. 6 is a partial enlarged view of B shown in FIG. 5;

FIG. 7 is a top view of the second rotor layer of the present invention;

FIG. 8 is a top view of a fifth rotor layer according to the present invention;

fig. 9 is a right side view of the first ram shown in fig. 6.

Shown in the figure: 1-machine shell, 11-top positioning bearing, 12-bottom positioning bearing, 13-thrust bearing, 14-oil suspension support, 141-support plate, 1411-arc oil channel, 1412-through hole, 142-jackscrew, 2-driving motor, 3-rotor, 31-first rotor layer, 32-second rotor layer, 33-third rotor layer, 34-fourth rotor layer, 35-fifth rotor layer, 4-middle shaft, 5-belt pulley, 6-hoisting piece, 7-hammer, 71-first hammer, 72-second hammer, 73-third hammer, 74-fourth hammer, 75-fifth hammer, 701-reinforcing rib, 702-metal plate, 81-top layer guard plate, 811-press groove, 812-press block, 82-bottom apron.

Detailed Description

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

As shown in fig. 1-2, the crusher comprises: the crusher comprises a machine shell 1, a driving motor 2, a rotor 3 and a middle shaft 4, wherein the driving motor 2 is vertically arranged at two sides of the machine shell 1, the symmetrically arranged driving motors 2 can be more stable when the crusher runs, the middle shaft 4 is arranged at the center of the machine shell 1 and movably connected with the machine shell 1, the rotor 3 is fixedly welded on the middle shaft 4, the top of the middle shaft 4 is provided with a belt pulley 5, the driving motor 2 is movably connected with the middle shaft 4 through a belt 51, the top of the machine shell 1 is provided with a feeding hole (not shown), the bottom of the machine shell 1 is provided with a discharging hole (not shown), and one side of the feeding hole is provided with a hoisting part 6 fixedly connected with the machine shell 1; the machine shell 1 is a cylindrical barrel body, a top positioning bearing 11 is arranged at the center position of the top of the machine shell 1, a bottom positioning bearing 12 is arranged at the center position of the bottom side in the machine shell 1, the middle shaft 4 is movably connected with the machine shell 1 through the top positioning bearing 11 and the bottom positioning bearing 12, a thrust bearing 13 used for supporting the middle shaft 4 is arranged right below the bottom positioning bearing 12, and the bottom end face of the middle shaft 4 is hemispherical; the rotor 3 comprises a first rotor layer 31, a second rotor layer 32, a third rotor layer 33, a fourth rotor layer 34, a fifth rotor layer 35 and a plurality of hammers 7 fixedly embedded on each rotor layer, the first rotor layer 31, the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34 and the fifth rotor layer 35 are tapered cylinders sequentially stacked up and down, the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34 and the fifth rotor layer 35 are equal in height, the first rotor layer 32 is 1.2-1.5 times as high as the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34 and the fifth rotor layer 35, circular mounting holes for fixedly connecting with the middle shaft 4 are formed in the centers of the first rotor layer 31, the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34 and the fifth rotor layer 35, the inclination angle of the outer tapered surface of the first rotor layer 31 is 60 degrees, the inclination angle of the outer tapered surface of the second rotor layer is 80 degrees, the inclination angle of the outer tapered surface of the third rotor layer is 82 degrees, the inclination angle of the outer tapered surface of the fourth rotor layer is 84 degrees, and the inclination angle of the outer tapered surface of the fifth rotor layer is 86 degrees.

Preferably, the height of the first rotor layer 31 is 350 mm, the heights of the second, third, fourth and

fifth rotor layers

32, 33, 34 and 35 are all 280 mm, the bottom diameter of the outer conical surface of the first rotor layer 31 is 1490 mm, the bottom diameter of the outer conical surface of the second rotor layer 32 is 1550 mm, the bottom diameter of the outer conical surface of the third rotor layer 33 is 1630 mm, the bottom diameter of the outer conical surface of the fourth rotor layer 34 is 1670 mm, and the bottom diameter of the outer conical surface of the fifth rotor layer 35 is 1690 mm.

In the present invention, the inclination angle of the outer conical surface of the first rotor layer 31 is set to 60 degrees, so that the crusher can crush and process the large ore input from the material inlet, as shown in fig. 2, gaps between the first rotor layer 31, the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34, and the fifth rotor layer 35 and the casing 1 are gradually reduced from top to bottom, and the large ore processed by the first rotor layer 31 is gradually crushed and reduced after passing through the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34, and the fifth rotor layer 35, so that the crusher can crush and refine the ore.

Further, as shown in fig. 3, the casing 1 further includes an oil suspension support 14, the oil suspension support 14 is disposed right below the center shaft 4, the oil suspension support 14 is configured to support the center shaft 4, the oil suspension support 14 includes a support plate 141, a plurality of jackscrews 142, and a hydraulic station (not shown), a hemispherical groove is disposed in the center of the support plate 141, and a hemispherical end surface at the bottom of the center shaft 4 is matched with the hemispherical groove; as shown in fig. 4, a through hole 1412 for supplying oil is formed in the center of the hemispherical groove, the through hole 1412 is connected with the hydraulic station through an oil pipeline, and four arc-shaped oil passages 1411 are formed in the hemispherical groove from the through hole 1412; a plurality of screw holes are formed in the bottom side of the supporting plate 141, and the jackscrews 142 are matched with the screw holes one by one to fix the supporting plate 141.

When the crusher of the present invention is in normal operation, the loss between the middle shaft 4 and the oil suspension support 14 is dissipated in the form of heat, and as the service life of the crusher increases, the temperature on the oil suspension support 14 is further accumulated, wherein the accumulated temperature of the support plate 141 is the highest, and therefore, further, an oil cooling loop is disposed on the arc-shaped oil passage 1411 to significantly reduce the temperature of the support plate 141.

Meanwhile, the material of the supporting plate 141 is an alloy material with good heat conductivity, high hardness and corrosion resistance, such as copper-manganese alloy, so that the heat conductivity and hardness of the supporting plate 141 are significantly improved.

The oil suspension support 14 plays a main supporting role for the middle shaft 4, and the thrust bearing 13 plays an auxiliary supporting role for the middle shaft 4.

When the multistage vertical crusher works normally, the hydraulic station continuously supplies oil to the supporting plate 141, hydraulic oil with thrust is uniformly filled in a gap between a hemispherical end face at the bottom of the center shaft 4 and a hemispherical groove of the supporting plate 141 through four arc-shaped oil passages 1411 on the supporting plate 141, and meanwhile, an oil film of 0.05-0.1mm is formed between the supporting plate 141 and the spherical end face at the bottom of the center shaft 4, and at the moment, the thrust bearing 13 does not generate a supporting effect on the center shaft 4. The oil film is generated, so that the friction force between the middle shaft 4 and the shell 1 is greatly reduced when the middle shaft 4 rotates, and the energy consumption of the crusher is greatly reduced.

After the breaker is powered off and stopped, the hydraulic station stops supplying oil to the supporting plate 141, at the moment, the gap between the supporting plate 141 and the spherical end face at the bottom of the middle shaft 4 is 0.02mm, and the thrust bearing 13 plays an auxiliary supporting role for the middle shaft 4.

Further, as shown in fig. 2, the hammer 7 includes a first hammer 71, a second hammer 72, a third hammer 73, a fourth hammer 74 and a fifth hammer 75, wherein the first hammer 71 is embedded on the outer conical surface of the first rotor layer 31, the second hammer 72 is embedded on the outer conical surface of the second rotor layer 32, the third hammer 73 is embedded on the outer conical surface of the third rotor layer 33, the fourth hammer 74 is embedded on the outer conical surface of the fourth rotor layer 34, the fifth hammer 75 is embedded on the outer conical surface of the fifth rotor layer 35, as shown in fig. 2 and 5-9, the first hammer 71, the second hammer 72, the third hammer 73, the fourth hammer 74 and the fifth hammer 75 are trapezoidal metal blocks with the same shape, and three oval grooves arranged in a straight line are formed in the middle of each hammer, the central position of oval recess bottom sets up the screw, wherein, the degree of depth of oval recess is greater than 3 times the thickness of the nut of bolt, oval recess is used for protecting the nut of bolt does not receive the destruction of ore when the breaker normal operating. Square grooves for fixing hammers are formed in the outer conical surfaces of the first rotor layer 31, the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34 and the fifth rotor layer 35, at least three reinforcing ribs 701 are fixedly welded to the left sides of the square grooves, the right sides of the reinforcing ribs 701 are fixedly welded to the metal plate 702, and three screw holes and bolts which are arranged in a straight line and are used for being fixedly connected with the hammers are formed in the metal plate 702; the degree of depth of oval recess is greater than 3 times the thickness of the nut of bolt, oval recess is used for the protection the nut of bolt does not receive the destruction of ore when breaker normal operating. The volumes of the first hammer head 71, the second hammer head 72, the third hammer head 73, the fourth hammer head 74 and the fifth hammer head 75 are sequentially reduced.

The breaker the rotor 3 forms for the integration casting the breaker normal operating because the intensity of rotor 3 itself is not high the in-process that the breaker smashed the ore the rotor 3 easily wears out, and rotor 3 is high in the cost of maintenance after wearing out.

Further, the outside of rotor 3 is provided with the rotor backplate, the rotor backplate sets up the right side at the tup, the rotor backplate is used for protecting the rotor layer on tup right side, is showing and is improving rotor 3's life reduces simultaneously 3 maintenance costs of rotor. The rotor guard plate is made of high-strength manganese steel, and the reinforcing ribs 701 are arranged on the left side of the hammer head, so that the rotor 3 can be protected by the reinforcing ribs 701.

Further, the rotor guard plate includes a top guard plate 81 and a bottom guard plate 82.

As shown in fig. 5 to 6, the top sheet 81 is disposed on the right side of the hammer head 71 on the outer tapered surface of the first rotor layer 31, the top protection plate 81 is a sector arc-shaped plate body, one end surface of the top protection plate 81 is provided with a groove, the grooves are matched with the inverted-L-shaped bosses arranged on the outer conical surface of the top rotor layer 31, the other end surface of the top layer guard plate 81 is a hook which is turned downwards, a pressing groove 811 is arranged at the right side fixing position of the inverted L-shaped boss on the outer conical surface of the top rotor layer 31, a second inverted-L-shaped boss matched with the clamping hook is arranged on one side of the pressing groove 811, a pressing block 812 is arranged in the pressing groove 811, the pressing piece 812 is fixed in the pressing groove 811 by a bolt, and the pressing piece 812 is used for fixing the top protection plate 81 on the outer conical surface of the first rotor layer 31.

As shown in fig. 7 to 8, the bottom guard plate 82 is disposed on the outer side conical surfaces of the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34, and the fifth rotor layer 35, the bottom guard plate 82 is a trapezoidal plate, a dovetail-shaped protrusion is transversely disposed at the center of one side of the trapezoidal plate, a dovetail groove matched with the dovetail-shaped protrusion is radially disposed at the center of the outer side conical surface of each bottom rotor layer, and a plurality of bottom guard plate transverse plates 82 are arranged in a line and fixed on the outer side conical surfaces of the second rotor layer 32, the third rotor layer 33, the fourth rotor layer 34, and the fifth rotor layer 35 through the dovetail groove.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A multi-stage vertical crusher comprising: the oil suspension support is arranged right below the middle shaft; the machine shell is a cylindrical barrel body, a top positioning bearing is arranged at the center position of the top of the machine shell, a bottom positioning bearing is arranged at the center position of the bottom side in the machine shell, the middle shaft is movably connected with the machine shell through the top positioning bearing and the bottom positioning bearing, a thrust bearing used for supporting the middle shaft is arranged right below the bottom positioning bearing, and the bottom end face of the middle shaft is hemispherical; the rotor comprises a plurality of rotor layers, a rotor guard plate is arranged on the outer side of the rotor and arranged on the right side of the hammer head, the rotor guard plate is used for protecting the rotor layers on the right side of the hammer head, each rotor layer is a conical cylinder, each rotor layer is stacked from top to bottom in sequence, a mounting hole used for being fixedly connected with the middle shaft is formed in the center of each rotor layer, the inclination angle of the outer conical surface of the rotor layer positioned at the topmost part is 50-70 degrees, the inclination angles of the outer conical surfaces of the rest rotor layers are sequentially increased from top to bottom by taking 80 degrees as an initial value, and the inclination angle of the outer conical surface of each rotor layer is smaller than 90 degrees; the rotor comprises a first rotor layer, a second rotor layer, a third rotor layer, a fourth rotor layer and a fifth rotor layer which are sequentially stacked from top to bottom, wherein the heights of the second rotor layer, the third rotor layer, the fourth rotor layer and the fifth rotor layer are equal, the height of the first rotor layer is 1.2-1.5 times of the heights of the second rotor layer, the third rotor layer, the fourth rotor layer and the fifth rotor layer, the inclination angle of an outer conical surface of the first rotor layer is 60 degrees, the inclination angle of an outer conical surface of the second rotor layer is 80 degrees, the inclination angle of an outer conical surface of the third rotor layer is 82 degrees, the inclination angle of an outer conical surface of the fourth rotor layer is 84 degrees, and the inclination angle of an outer conical surface of the fifth rotor layer is 86 degrees; the height of the first rotor layer is 350 mm, the heights of the second rotor layer, the third rotor layer, the fourth rotor layer and the fifth rotor layer are all 280 mm, the bottom diameter of the outer conical surface of the first rotor layer is 1490 mm, the bottom diameter of the outer conical surface of the second rotor layer is 1550 mm, the bottom diameter of the outer conical surface of the third rotor layer is 1630 mm, the bottom diameter of the outer conical surface of the fourth rotor layer is 1670 mm, and the bottom diameter of the outer conical surface of the fifth rotor layer is 1690 mm; a plurality of hammers are uniformly arranged on the outer conical surface of each rotor layer, each hammer is a trapezoidal metal block, three oval grooves which are arranged in a straight line are formed in the middle of each hammer, and a screw hole is formed in the center of the bottom of each oval groove; the outer conical surface of each rotor layer is provided with a square groove for positioning and fixing the hammer head, the left side of the square groove is fixedly welded with at least three reinforcing ribs, the right side of each reinforcing rib is fixedly welded on the same metal plate, and the metal plate is provided with three screw holes and bolts which are arranged in a straight line and are used for being fixedly connected with the hammer head; the hammer heads on the same rotor layer have the same size, and the hammer heads on different rotor layers have different sizes, wherein the volume of the hammer head on the rotor layer at the top is larger than that of the hammer head on the rotor layer at the bottom; the hammer comprises a first hammer, a second hammer, a third hammer, a fourth hammer and a fifth hammer, wherein the first hammer is embedded on the outer conical surface of the first rotor layer, the second hammer is embedded on the outer conical surface of the second rotor layer, the third hammer is embedded on the outer conical surface of the third rotor layer, the fourth hammer is embedded on the outer conical surface of the fourth rotor layer, the fifth hammer is embedded on the outer conical surface of the fifth rotor layer, the first hammer, the second hammer, the third hammer, the fourth hammer and the fifth hammer are trapezoidal metal blocks with the same shape, three elliptical grooves which are arranged in a shape like a Chinese character 'ji' are formed in the middle of each hammer, a screw hole is formed in the center position of the bottom of each elliptical groove, and the depth of each elliptical groove is more than 3 times of the thickness of a nut of the bolt, the oval groove is used for protecting a nut of the bolt from being damaged by ore when the crusher normally operates; square grooves for fixing hammer heads are formed in the outer conical surfaces of the first rotor layer, the second rotor layer, the third rotor layer, the fourth rotor layer and the fifth rotor layer, at least three reinforcing ribs are fixedly welded to the left sides of the square grooves, the right sides of the reinforcing ribs are fixedly welded to a metal plate, and three screw holes and bolts which are arranged in a straight line and are used for being fixedly connected with the hammer heads are formed in the metal plate; the depth of the oval groove is more than 3 times of the thickness of the nut of the bolt, and the oval groove is used for protecting the nut of the bolt from being damaged by ore when the crusher normally operates; the volumes of the first hammer head, the second hammer head, the third hammer head, the fourth hammer head and the fifth hammer head are reduced in sequence; the oil suspension support is used for supporting the middle shaft and comprises a support plate, a plurality of jackscrews and a hydraulic station, a hemispherical groove is formed in the center of the support plate, and a hemispherical end face at the bottom of the middle shaft is matched with the hemispherical groove; the center of the hemispherical groove is provided with a through hole for supplying oil, the through hole is connected with the hydraulic station through an oil conveying pipe, and four arc-shaped oil passages are uniformly formed in the hemispherical groove from the through hole to the outside; a plurality of screw holes are formed in the bottom side of the supporting plate, and the jackscrews are matched with the screw holes one by one to fix the supporting plate; and an oil cooling loop is arranged at the bottom of the supporting plate.

2. The crusher of claim 1, wherein the rotor shields comprise a top shield and a bottom shield; the top layer protection plate is arranged on the right side of the hammer head on the outer conical surface of the top rotor layer, the top layer protection plate is a fan-shaped arc plate body, a groove is formed in one end face of the top layer protection plate, the groove is matched with an inverted L-shaped boss arranged on the outer conical surface of the top rotor layer, the other end face of the top layer protection plate is a hook which is turned downwards, a pressing groove is formed in the position, at the right side fixing position of the inverted L-shaped boss, on the outer conical surface of the top rotor layer, of the inverted L-shaped boss, a second inverted L-shaped boss matched with the hook is arranged on one side of the pressing groove, a pressing block is arranged in the pressing groove, the pressing block is fixed in the pressing groove through bolts, and the pressing block is used for fixing the top layer protection plate; the bottom backplate sets up on the outside conical surface on each rotor layer below the rotor layer at top, the bottom backplate is the trapezoidal plate body, the center of trapezoidal plate body one side transversely is provided with the dovetail arch, the center of the outside conical surface on each rotor layer below the rotor layer at top along radially seted up with the protruding complex dovetail of dovetail, a plurality of the horizontal row of bottom backplate passes through the dovetail is fixed.