JP3105405B2 - Vertical crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical grinding machine for grinding raw materials such as cement raw materials, slag, clinker, ceramics, and chemicals by cooperation of a rotary table and a grinding roller. The vertical load applied is not supported by the reducer that applies rotational force to the rotary table, but is supported by a hydrostatic bearing that is separately installed below the outer periphery of the rotary table, reducing the size of the reducer and preventing vibration problems of the reducer. The present invention also relates to a vertical pulverizer that considers thermal deformation of a hydrostatic bearing.

[0002]

2. Description of the Related Art As one type of a crusher for finely pulverizing raw materials such as limestone, slag and cement raw material into powder, FIG.
As shown in FIG. 1, a vertical pulverizer 1 having a rotary table and a pulverizing roller is widely used. A pulverizer of this type includes a disk-shaped rotary table 3A that is driven by an electric motor 2B via a speed reducer 2 and rotates at a low speed at a lower portion of a cylindrical casing 15 and a portion that equally divides an outer peripheral portion of an upper surface thereof in a circumferential direction. And a plurality of crushing rollers 4 which are pressed by hydraulic pressure or the like and driven to rotate.

The crushing roller 4 includes an arm 5 pivotally supported on a casing 15 by a shaft 6 and arms 7A and 7B.
Is connected to the piston rod 10 of the hydraulic cylinder 9 via the hydraulic cylinder 9. By operating the hydraulic cylinder 9, the crushing roller 4 is pressed onto the rotary table 3 </ b> A to apply crushing pressure to the raw material. 3S is a dam ring provided on the outer peripheral edge of the rotary table 3A to adjust the thickness of the raw material layer, 14 is an annular space passage for the pulverized product overflowing the rotary table 3A, 17 is a material charging chute, and 18 is an annular space passage 14
A scraper that scrapes the crushed product that has fallen into The crushed product scraped by the scraper 18 is discharged out of the machine through a discharge chute 19 as shown in FIG.

In such a vertical pulverizer, the raw material supplied to the center of the rotary table by the raw material charging chute 17 receives the centrifugal force in the table radial direction by the rotation of the rotary table 3A and slides on the rotary table 3A. Sometimes, a force in the rotating direction is received by the rotating table 3A, and the rotating table 3A
And a rotation somewhat slower than the rotation speed of the turntable 3A is performed. The above two forces, that is, the force in the radial direction and the force in the rotation direction are combined, and the raw material moves on the turntable 3A to the outer periphery of the turntable 3A along a spiral trajectory. Since a roller is pressed against this outer peripheral portion and is rotating, the raw material describing the spiral enters the crushing roller 4 and the rotary table 3A from a direction forming an angle with the roller axis direction and bites. Rarely crushed.

On the other hand, in the speed reducer 2 disposed immediately below the rotary table 3A, the rotary table 3A is mounted on and connected to a horizontal disk attached to an output shaft projecting from the top.
The speed reducer applies a rotational force applied by the horizontal electric motor 2B to the rotary table 3A while applying the full load transmitted through the rotary table 3A.

[0006]

As described above, in the conventional vertical crusher 1, the rotary table 3A is directly connected to the output shaft of the speed reducer 2 which is disposed concentrically directly below the rotary table 3A. The reduction gear 2 always supports not only the weight of the rotary table 3A and the crushing roller 4 but also the crushing force urged by the hydraulic cylinder 9, so that the reduction gear 2 has a very large rigidity. It is necessary to maintain the size, which has caused a cost increase due to an increase in size. In addition, vibration caused by the fluctuating load during grinding is constantly transmitted, causing damage to the power transmission unit including the gears inside the reduction gear, resulting in a reduction in life due to the occurrence of a reduction gear trouble and a large cost for maintenance. And was forced to consume labor. In addition, since the reduction gear 2 itself has a built-in bevel reduction mechanism for converting the horizontal output shaft of the electric motor 2B into a vertical axis, the height and the occupied area (installation space) of the reduction gear 2 are increased, resulting in an increase in cost. At the same time, a large building area was required. Also, for example, a high-temperature clinker (normal temperature 8)
(0 ° C to 150 ° C, maximum 200 ° C), the heat of crushing is applied to the high-temperature raw material, and the temperature of the rotary table rises.
The hydrostatic bearing 30a has a problem in that the sliding surface receives an eccentric load due to a one-sided contact and is damaged or shortened in life.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to provide a vertical crusher having a trouble-free power transmission mechanism, and to save space and equipment costs, the present invention provides: A plurality of rotatable crushing rollers are arranged on the outer peripheral surface of the rotary table, and a predetermined pressure is applied to the raw material supplied on the rotary table to apply a predetermined pressure to the crushing roller. In a vertical pulverizer for pulverizing, a speed reducer for applying a rotational force to the rotary table is disposed at a central portion immediately below the rotary table, and supports a vertical load such as its own weight and a pulverizing force applied to the rotary table. A static pressure bearing is provided immediately below the grinding roller pressing area on the outer periphery of the rotary table, and a column base for supporting the static pressure bearing is provided separately from the speed reducer. Spherical pivot between top of A center pivot type bearing that is pressed through a bearing, a side press that suppresses horizontal movement is disposed on the side of the hydrostatic bearing, and a crushing roller is mounted on the rotary table. is the flat plate portion and the static pressure bearing is lower in a bearing extending to the outer periphery below the flat plate portion that Oh
An outer cylindrical portion having a certain height and a reduced thickness, and having an inner cylindrical portion extending below the center of the flat plate portion and engaging the output shaft and the lower end of the speed reducer, a configuration in which the vertical load applied to the rotary table is supported by the static pressure bearings transmitted substantially perpendicular to the outer peripheral cylindrical portion, the inner peripheral cylindrical portion
A rotating cylinder integrally attached to a lower end of the inner peripheral cylindrical portion, and
And the inner peripheral surface is slidably fitted around the outer periphery of the rotary cylinder.
A support for supporting the pedestal through the support ring
And a plurality of circumferences are provided between them. In the second invention, the speed reducer is a vertical two-stage planetary speed reducer, and in the third invention, a pit is further formed immediately below the speed reducer, and the vertical electric motor for rotating and driving the speed reducer is provided in the pit. It was arranged inside.

[0008]

According to the present invention, a hydrostatic bearing for supporting the vertical load applied to the rotary table is provided at the lower end of the outer peripheral portion of the rotary table, and the weight of the rotary table and the pulverization pressed by the pulverizing table at the outer periphery of the rotary table. A vertical load such as a force is transmitted almost vertically through the outer cylindrical portion and supported by a hydrostatic bearing, while the rotational force is transmitted to the rotary table by the inner cylindrical portion engaged with the output shaft of the speed reducer. Therefore, the deformation of the rotary table due to the vertical load is small, and the thermal distortion of the lower end of the inner cylindrical portion and the lower end of the outer cylindrical portion due to the heat transfer by the high-temperature raw material or the crushing heat given to the flat plate portion also has the conventional structure of a vertical pulverizer. Since the size of the rotary table is extremely small as compared with the substantially flat rotary table used in the above, the adverse effects due to load deformation and thermal strain on the hydrostatic bearing and the reducer are small, and the damage to the equipment and the service life can be reduced. In addition, although the movement of the hydrostatic bearing in the vertical and horizontal directions is constrained, the tilting is free without being constrained, so it follows the slight tilt of the rotating table during operation,
Unreasonable force is not applied to the hydrostatic bearing to prevent damage. Furthermore, in the second invention, a planetary two-stage speed reducer is used instead of the conventional bevel speed reducer, so that the size of the speed reducer is reduced. In the third invention, a pit is provided immediately below the speed reducer. By storing the vertical motor and connecting it directly to the speed reducer, the mill itself can be reduced in size, not only to save space in the factory, but also to reduce the equipment cost of the entire vertical mill.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 relate to an embodiment of the present invention,
FIG. 1 is an overall vertical sectional view of a vertical pulverizer, and FIG.
FIG. 3 is an enlarged vertical sectional view of an essential part of a vertical crusher, FIG. 4 is an enlarged longitudinal sectional view of an essential part of a hydrostatic bearing, and FIG. 5 is a speed reducer (vertical two-stage planetary speed reducer). FIG. 6 is an explanatory view of a speed reducer (planetary speed reducer). 7 to 9 are thermal deformation analysis diagrams of the rotary table. As shown in FIGS. 1 to 3, in the vertical pulverizer 1 of the present invention,
A pit 100 is formed directly below the center axis where the motor is installed, and an electric motor 2B composed of a vertical electric motor, a speed reducer 2 composed of a vertical two-stage planetary reducer, and a vertical pulverizer 1 are sequentially arranged from below to above. Is established. In the vertical pulverizer 1, a rotary table 3A is rotatably disposed around a vertical axis coaxially with the casing 15 inside a vertical cylindrical casing 15, and a plurality of rotary tables 3 (see FIG. 1 to 4 in the embodiment of FIG. 3), and an arm 5 swingable about a rotation axis 6 of a bearing 6A installed on the top of a column base 30 formed of a double cylinder. And arms 7A, 7
The rotary table 3A is pressed by the hydraulic cylinder 9 via B and is driven. As shown in the figure, the shape of the turntable 3A is a horizontal flat plate portion 3X having a vertical cross section and a substantially cylindrical outer circumferential cylindrical portion 3 connected to the lower part of the outer periphery of the flat plate portion 3X.
Y and a cylindrical inner peripheral cylindrical portion 3 </ b> Z connected downward around the central through hole of the flat plate portion 3 </ b> X are integrally structured. The reason why the shape of the turntable 3A is formed as described above will be described. Applicants have identified high temperature raw materials, such as
Regarding the thermal deformation of the rotary table when pulverizing a clinker at a common use temperature of 80 ° C. to 150 ° C. and a maximum of 200 ° C., the finite element method (N
(ASTRAN). Rotary table 3A
When the same boundary condition was applied to each of the dozens of types and the state of thermal deformation was observed, it was found that there was a large difference in thermal deformation depending on the shape. Here, a conventional flat plate-shaped rotary table 3
The analysis results of A (TYPE A), the turntable 3A (TYPE B) with the least thermal deformation, and the turntable 3A (TYPE C) with an intermediate degree of thermal deformation are shown. FIG.
FIG. 9 shows TYPE A, TYPE B, and TYPE, respectively.
C shows the analysis results of the rotary table 3A. The results show that the thermal strain near the hydrostatic bearing 30a was 1100 μm in TYPE A, but 300 mm in TYPE B.
μm (about 600 μm for TYPE C). Judging from the above results, the flat TYPE of the conventional structure
A, the outer cylindrical portion 3Y and the inner cylindrical portion 3Z are connected to the flat plate portion 3X, respectively, and the rotary table 3A (the present invention) having a shape having a certain height is desirable from the viewpoint of eliminating thermal effects. all right. Further, in TYPE B, it has been found that the thermal distortion can be kept small even if the thickness of the outer peripheral cylindrical portion 3Y is considerably reduced as far as the rigidity allows, so that the cost can be reduced by reducing the weight. As described above, in the vertical pulverizer 1 of the present invention, the vertical load is not applied to the speed reducer 2 as in the conventional structure, but is applied by the own weight of the rotary table 3A or the hydraulic cylinder 9 separately from the planetary speed reducer 2. The mechanism supports vertical loads such as crushing force. Therefore, the planetary speed reducer 2 only needs to have a function of transmitting the rotational torque for the rotary drive, and can be downsized accordingly, and is less affected by the vibration phenomenon caused by the load fluctuation during the grinding work. Damage is reduced and a long life is achieved. Further, since the rotary table is formed to have a small thermal deformation, troubles due to the thermal influence of a static pressure bearing and a speed reducer to be described later are prevented.

A donut disk-shaped flange shoe 3B is fixed below the outer peripheral portion of the turntable 3A.
As shown in FIG. 4, the flange shoe 3 </ b> B is provided on a support plate 3 at a top of a column base 30 disposed inside a lower part of a stand 40.
Hydrostatic bearing (thrust pad) 30a mounted on the top
The hydrostatic bearing 30a is mounted on the rotating table 3A, and supports a vertical load such as its own weight and a crushing force applied to the rotary table 3A. The thrust pad 30a is a kind of a hydrostatic bearing, and as shown in FIG.
A spherical pivot 35 having a spherical lower surface is fitted in the lower center of the base metal 31 having the bearing metal 32 attached to the upper surface, and a support plate 30P is provided beside the base metal 31.
And is pressed by a pair of left and right side holders 30C in the shape of a kokeshi having a curved surface at the top, thereby restricting horizontal and horizontal movement. Thus, the thrust pad 30a as a hydrostatic bearing is constituted by the bearing metal 32 and the base metal 31 on which the spherical pivot 34 is fitted. Support plate 30P
A high-hardness support column 30 </ b> Q that is in contact with the spherical surface of the spherical pivot 35 is fitted into the upper center of the. Lower surface of flange shoe 3B and bearing metal 32 of thrust pad 30a
The upper surface serves as a sliding surface when rotating the rotary table 3A, and includes a lubricating oil supply port 33 and an oil supply path 33 formed in the base metal 31.
The oil is lubricated through a. The hydrostatic bearing (thrust pad) 30a configured as described above is mounted on the rotary table 3A.
A rotary table that supports a vertical load such as its own weight and a crushing force (crushing roller pressing force) that is transmitted to the foundation through the column base 30 and that is generated due to the constantly changing pressing force acting on each of the crushing rollers 4. The contact position of the spherical pivot 35 and the support column 30Q changes and follows the minute tilt of 3A, thereby preventing an excessive force from being applied to the sliding surface (the lower surface of the flange shoe 3B and the upper surface of the bearing metal 32). Three thrust pads 30a are arranged immediately below a plurality of (four in the embodiment of FIGS. 1 to 4) pulverizing rollers 4 stacked on the rotary table 3A. As shown in FIG. 3, a cylindrical rotary cylinder 3C having a flange at the top is integrally formed with the rotary table 3A so as to protrude below the inner cylindrical portion 3Z of the rotary table 3A.
A cylindrical fixing ring 30B supported by a plurality of circumferential stays 30A extending diagonally upward and inward from the column base 30
The rotary cylinder 3C is fitted on a support ring 30b fixed inside the rotary cylinder 3C.
The sliding surface between the support ring 30b and the thrust pad 30a
It is lubricated and lubricated like the upper surface. The roles of the upper surface of the thrust pad 30a and the inner surface of the support ring 30b forming these two sliding surfaces are such that the upper surface of the thrust pad 30a mainly supports a vertical load, whereas the inner surface of the support ring 30b is loaded on the rotary table 3A. The purpose is to prevent the rotary table 3A from tilting or moving horizontally due to the eccentric load, and to equalize the vertical load around the circumference. The thrust pad 30a may be formed in the shape of a donut disk, but is usually locally disposed immediately below each grinding roller 4 as described above. The thrust pad 30a is also called a hydrostatic bearing, and the material of the bearing metal 32 can be white metal (WJ2), phosphor bronze, lead bronze, cadmium alloy, or the like, like the inner surface of the support ring 30b. In place of the above-described hydrostatic bearing 30a having the spherical pivot 35 and the support column 30Q, a wedge-shaped slit 50 is formed on the outer periphery of the lower end of the rotary table 3A as shown by a two-dot chain line (virtual line) in FIG. The hydrostatic bearing (thrust pad) 30a supports a vertical load such as its own weight and a crushing force (crushing roller pressing force) applied from the rotary table 3A, and is formed on the foundation through the column base 30. In addition to transmitting the heat, the rotary table 3
Even if A is bowl-shaped, the wedge-shaped slit 50 provided at the lower end of the outer peripheral portion of the rotary table 3A absorbs this deformation and prevents a one-sided contact caused by thermal deformation, thereby protecting the hydrostatic bearing. The same operation and effect can be achieved by providing the slit 50 not on the rotary table 3A but on the outer peripheral portion of the upper surface of the flange shoe 3B. When the slit 50 is provided, the slit 5
For the dimension of 0, the maximum slit height is 0.6 mm for a slit length of 200 mm (horizontal distance).

[0011]

On the other hand, the rotary drive of the rotary table 3A is screwed around the top outer periphery of the output shaft 2a of a speed reducer (vertical two-stage planetary speed reducer in this embodiment) 2 disposed directly below the center of the rotary table 3A. This is implemented by meshing between the spur gear and the internal gear mounted on the inner peripheral surface of the rotary cylinder 3C, and the vertical load applied to the rotary table 3A is not transmitted to the speed reducer 2.
In the vertical pulverizer 1 of the present invention configured as described above, the turntable 3A is driven to rotate via the electric motor 2B and the speed reducer 2, and the raw material is supplied to the raw material charging chute 17 and the branch pipe 17.
A, falls immediately before each grinding roller 4, is ground between the rotary table 3 A and the grinding roller 4, overflows the rotary table 3 A, falls into the annular space passage 14, and is scraped by the scraper 18. It is discharged outside the machine from the raw material discharge port. The branch pipe 17A is provided with a plurality of weir plates 17B in the lower half to store the raw material so as to prevent abrasion of the raw material having high abrasion such as clinker.
Form a cushion.

Next, details of the speed reducer 2 will be described with reference to FIGS. The speed reducer 2 employed in the present invention is a vertical two-stage planetary speed reducer, in which two upper and lower planetary portions are disposed. The lower planetary part is called a first-stage planetary part. Three first-stage planetary gears P1 mesh with the first-stage sun gear S1 and the first-stage internal gear (ring gear) R1. Is called a second stage planetary portion, and five second stage planetary gears P2 are meshed between the second stage sun gear S2 and the second stage internal gear (ring gear) R2. There is a correlation between the reduction ratio i of the planetary gears and the number of planetary gears. As shown in FIG. 6, the reduction ratio i is determined by the pitch circle diameter dR of the internal gear (ring gear) R and the sun gear S. In general, when the pitch circle diameter dR is larger than the pitch circle diameter dS, the reduction ratio i increases, but conversely, the sun gear S and the internal gear R The number of the planetary gears P that can be stored between them decreases. On the other hand, as the number of the planetary gears increases, the share of the power transmission force to each planetary gear decreases, and the diameter dR of the internal gear (ring gear) R is relatively smaller than the diameter dS of the sun gear S. The reduction gear 2 can be made compact.

In the case of the present invention, since the height without the bevel portion can be reduced as compared with the conventional speed reducer having a bevel portion (shown in FIG. 10), a two-stage planetary speed reducer is used. Can be. Then, the above-described conventional bevel type planetary reduction gear (for example, bevel reduction ratio iB = 4, planetary reduction ratio iP = 1)
Similarly to the case of 0), in order to provide a vertical two-stage planetary reduction gear having a reduction ratio of 40, a one-stage (lower) reduction ratio i = 8.9 (the number of planets is 3)
), 2nd (upper) reduction ratio i = 4.5 (5 planets)
The size (diameter) of the entire speed reducer is smaller than that of the conventional two-stage planetary speed reducer having five planetary gears in the case of the present invention, and the size is reduced.

As described above, the vertical pulverizer 1 according to the present invention is used.
In the conventional method, the vertical load is not applied to the speed reducer 2 as in the conventional structure, and the static pressure bearing protected from thermal deformation separates from the speed reducer 2 by the weight of the rotary table 3A and the pulverization applied by the hydraulic cylinder 9. The mechanism supports vertical loads such as force. Therefore, the speed reducer 2 only needs to have a function of transmitting the rotational torque for the rotary drive, and can be reduced in size accordingly, and is less affected by the vibration phenomenon caused by the load fluctuation during the pulverization work. Damage is reduced and long life is achieved. In addition, since the reduction gear has a smaller diameter than that of the conventional type, a crusher portion (casing 1
5 and rotating table 3A)
Lifting and moving can be performed upward, thereby shortening the working time and improving the working efficiency. Further, since the pit 100 is formed and the electric motor 2B is disposed as a vertical electric motor immediately below the speed reducer 2 and directly connected to the speed reducer 2, the speed reducer 2 can be a vertical two-stage planetary speed reducer without a bevel portion. 2 is compact and compact, and accordingly the underbody of the vertical pulverizer is also compacted, and space can be saved. In addition, since the electric motor 2B conventionally located on the ground is stored in the pit 100, space saving is further achieved.

[0016]

As described above, according to the present invention, a vertical load is not applied to the speed reducer, and the size and weight of the speed reducer can be reduced. In addition, the equipment cost is reduced, and the trouble of the reduction gear caused by the abnormal vibration during the pulverization is avoided, and the maintainability is improved. In addition, since the thermal deformation of the rotary table is small so that the adverse effects of the thermal deformation do not affect the hydrostatic bearing, a long life can be achieved without damaging the hydrostatic bearing.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a vertical crusher according to an embodiment of the present invention.

FIG. 2 is a sectional plan view taken along line AA of FIG.

FIG. 3 is a vertical sectional view of a main part of a vertical crusher according to an embodiment of the present invention.

FIG. 4 is an enlarged vertical sectional view of a main part of a hydrostatic bearing according to an embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a speed reducer (vertical two-stage planetary speed reducer) according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram of a planetary reduction gear according to an embodiment of the present invention.

FIG. 7 is a thermal distortion analysis state diagram of the turntable according to the embodiment of the present invention.

FIG. 8 is a thermal distortion analysis state diagram of the turntable according to the embodiment of the present invention.

FIG. 9 is a thermal distortion analysis state diagram of the turntable according to the embodiment of the present invention.

FIG. 10 is an overall vertical sectional view of a conventional vertical crusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical grinder 2 Reduction gear (planetary reduction gear) 2A Inching motor 2B Electric motor 2a Output shaft 3A Rotary table 3B Flange shoe 3C Rotating cylinder 3S Dam ring 3X Flat plate part 3Y Outer cylinder part 3Z Inner cylinder part 4 Crush roller 5 Arm 6 axis (rotating axis) 7 Arm 7A Arm 7B Arm 9 Hydraulic cylinder 14 Annular space passage 15 Casing 16 Discharge port 17 Material input chute 17A Branch pipe 17B Weir plate 18 Scraper 19 Discharge chute 30 Column base 30A Stay 30B Fixing ring 30P Support Plate 30Q Support column 30a Hydrostatic bearing (thrust pad) 30b Support ring 31 Base metal 32 Bearing metal 33 Lubrication oil supply port 34 Oil supply path 35 Spherical pivot 40 Stand 50 Slit 100 Pit P Planetary gear P1 First stage planetary gear P2 Second stage Planetary gear Internal gear (ring gear) R1 First stage internal gear (ring gear) R2 Second stage internal gear (ring gear) S Sun gear S1 First stage sun gear S2 Second stage sun gear dR Pitch of internal gear Circle diameter dS Pitch circle diameter of sun gear i Reduction ratio iB Bevel reduction ratio iP Planetary reduction ratio

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-144858 (JP, A) JP-A 50-140059 (JP, U) JP-A 5-67334 (JP, U) JP-A 63-144 20952 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B02C 15/00-15/16

Claims (3)

(57) [Claims] 1. A plurality of rotatable crushing rollers are disposed on an upper surface of an outer peripheral portion of a rotary table, and a predetermined pressure is applied to the crushing rollers for the raw material supplied on the rotary table to apply a predetermined pressure to the rotating table. In a vertical pulverizer for pulverizing between a surface and a surface, a reducer for applying a rotational force to the rotary table is disposed at a central portion immediately below the rotary table, and the own weight and the pulverizing force applied to the rotary table A static pressure bearing for supporting the vertical load of the rotary table is disposed directly below the grinding roller pressing area on the outer periphery of the rotary table, and a column base for supporting the static pressure bearing is provided separately from the speed reducer. The bearing is a center pivot type bearing pressed through a spherical pivot between the bearing and the upper surface of the column base, and a side retainer for suppressing horizontal movement is disposed on a side surface of the hydrostatic bearing, And the rotary table is A flat plate portion on which a crushing roller is mounted, an outer peripheral cylindrical portion extending downwardly on the outer periphery of the flat plate portion and having a lower end supported by the hydrostatic bearing and having a certain height and a reduced thickness, and a center of the flat plate portion. A vertical cylindrical portion extending downwardly and engaging the output shaft of the speed reducer with a lower end thereof. The vertical load applied to the rotary table is transmitted substantially vertically through the outer cylindrical portion, and the static Pressure bearing, and the inner circumference
Rotation in which the cylindrical part is integrally attached to the lower end of the inner peripheral cylindrical part
The inner peripheral surface is slidable around the outer periphery of the cylinder and the rotating cylinder.
The stay for supporting via the support ring fitted
A vertical crusher provided with a plurality of circumferences between the column base . 2. The vertical pulverizer according to claim 1, wherein the speed reducer is a vertical two-stage planetary speed reducer. 3. The vertical pulverizer according to claim 1, wherein a pit is formed immediately below the speed reducer, and a vertical electric motor for rotating and driving the speed reducer is disposed in the pit.