JPH0523606A - Roller type grinder and operating method thereof - Google Patents

Abstract

PURPOSE:To reduce torsional load acting on the housing of a roller type grinder and to make the housing lightweight. CONSTITUTION:A roller type grinder is provided with a plurality of pieces of grinding rollers rotated while receiving the down load on a grinding ring which is rotated in the horizontal face of the lower part in the inside of a housing, roller brackets for rotatably supporting these rollers, roller pivots provided to the upper part thereof, a frame 9 pressurizing the roller brackets and the grinding rollers to the lower part via both the roller pivots provided to the upper part thereof and a pivot and a loading rod for stretching the frame 9 to the lower part. Further the hydraulic cylinder 17, 33 for controlling the tensile force and the tensile direction of the loading rod, a slide 30, a connecting rod 32 and a controlling device 27 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type crushing apparatus and an operating method thereof, and more particularly to a roller type crushing apparatus suitable for reducing stress generated in a housing and an operating method thereof.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional roller type crushing device.
The yoke 10 is rotatably mounted on the output shaft of the speed reducer 11, and the crushing ring 1 is fixed to the yoke 10. A grinding roller 2 rotatably fixed to a roller bracket 3 by a shaft and a bearing is placed in a recess (a hollow) on the grinding ring 1. A groove into which the roller pivot 4 is inserted is formed in the upper portion of the roller bracket 3 and the lower surface of the frame 9. The roller bracket 3 and the roller 2 are pressed against the crushing ring 1 by the frame 9 via the roller pivot 4, and the roller 2 falls over. It is supposed not to. The frame 9 is connected to a pressure cylinder 17 via a pivot arm 12 and a loading rod 13.

When the input shaft of the speed reducer 11 is rotated by the motor, the yoke 10 attached to the output shaft of the speed reducer 11 is rotated.
And the crushing ring 1 fixed to the yoke 10 rotates. At this time, a pressurizing hydraulic cylinder (hereinafter referred to as a pressurizing cylinder) 17 pulls the loading rod 13, and this pulling force pushes the frame 9 downward through the pivot arm 12, and the frame 9 causes the roller pivot 4,
The crushing roller 2 is pressed against the crushing ring 1 via the roller bracket 3. The material to be crushed (for example, coal) is dropped from the supply pipe 14 in the upper center, and the roller 2 and the crushing ring 1 are used.
It is sandwiched between and is crushed by the crushing action. The crushed object (for example, pulverized coal) is blown up by hot air and passes through the classifier 15, and the particles having a predetermined particle size are classified into the outlet pipe 16, and the particles having a larger particle size are classified by the classifier 15 and crushed. The structure is such that it falls to the section and is crushed again.

[0004]

In the above-mentioned prior art, since the housing 19 continuously receives a fluctuating load from the frame 9 at the time of crushing, torsional stress is generated in the housing 19,
There is a problem that the plate thickness of the housing 19 must be made thick. In FIG. 4, when the yoke 10 and the crushing ring 1 fixed to the yoke 10 are rotated during crushing, the crushing roller 2 on the crushing ring 1 is fixedly rotated accordingly. At this time, the roller 2, the roller bracket 3 and the frame 9 on the crushing ring 1 are integrated into the yoke 1
0 and the grinding ring 1 try to rotate in the direction of rotation.
As shown in FIG. 5, this rotating force causes a slight gap between the frame 1 and the frame 1 to cause the housing 1 to rotate.
It is received by a wear ring plate 20 which is fixed to a support rod 21 at 9. At the time of crushing, the roller 2 is in contact with the object to be crushed 18 on the crushing ring 1, and the contact resistance between the roller 2 and the object to be crushed 18 is not constant, or the force to rotate the frame 9 due to the vibration at the time of crushing. Always fluctuates. Therefore, the housing 19 continuously receives a shocking fluctuating load from the frame 9 via the wear ring plate 20 and the supporting rod 21, and there is a problem that the plate thickness must be increased to withstand this. .

The object of the present invention is to reduce the torsional load acting on the housing of a roller type crusher, thereby reducing the thickness of the housing, reducing the weight of the entire apparatus (cost reduction), and vibrating the crusher. To provide a roller type crushing device and a method of operating the same.

[0006]

In order to achieve the above object, the first invention of the present application is to provide a crushing ring which rotates in a horizontal plane below the housing, and a load which is placed on the crushing ring and which is vertically downward. A plurality of crushing rollers that rotate while
A roller bracket that rotatably holds the crushing roller, a roller pivot that is provided above the roller bracket, and a roller pivot that is provided above the roller pivot and that transmits a vertically downward load to the crushing roller via the roller pivot and the roller bracket. In a roller-type crushing device provided with a frame, a stopper device provided inside the housing for restraining the horizontal rotation of the frame, and a loading rod for applying a vertically downward load to the frame, The present invention relates to a roller type crushing device, which is provided with an inclination angle with respect to, and is provided with a device for changing the inclination angle.

According to a second aspect of the present invention, the crushing ring is rotated in a horizontal plane below the housing, and a plurality of crushing rollers rotatably held by roller brackets are loaded vertically downward on the crushing ring. It is rotated while being applied to apply a vertical load to the roller bracket and the crushing roller via the roller pivot provided on the upper part of the roller bracket, the frame provided above the roller pivot, and the loading rod that pulls the frame downward, and In the operation method of the roller type crusher for crushing the object to be crushed between the crushing ring and the crushing roller by restraining the rotation in the direction by the stopper device provided in the housing, the pulling direction of the loading rod downward is Inclining with respect to the vertical direction, detecting the load applied to the stopper device,
The present invention relates to a method for operating a roller-type crusher characterized by controlling an inclination angle of a loading rod and / or a downward pulling force of the loading rod based on the detected value.

A third aspect of the invention is the same as the second aspect of the invention.
The present invention relates to a method for operating a roller type crushing device, characterized in that the load applied to the stopper device is detected by the operating torque of the crushing device or the current value of a motor for operating the crushing device.

[0009]

The loading rod 13 is tilted with respect to the vertical direction, and the tilting angle is made variable to form the tilting angle variable tilting loading rod.
Is applied obliquely with respect to the vertical direction, the tilted loading rod not only exerts a force in the vertical direction, that is, in the direction of pressing the roller 2 onto the grinding ring 1, but also in the horizontal direction, that is, the frame 9 causes the grinding ring 1 and the yoke to move. 1
It is also possible to make variable the force in the direction that supports the force that tends to rotate in the zero rotation direction. Therefore, the force transmitted from the frame 9 through the wear ring plate 20 and acting on the housing 19 is appropriately reduced.

[0010]

1 is a plan view showing an embodiment of a roller type crushing device according to the present invention, and FIG. 2 is a side view showing a mounting state of a loading rod of an embodiment of the roller type crushing device according to the present invention. is there. As shown in FIG. 1, a pair of stoppers 24 a and 24 b for preventing the rotation of the frame 9 are provided at the corners of the frame 9 on the inner surface of the housing 19 with a gap between the pair of stoppers 24 a and 24 b. It is fixed by. The stopper base 25a
A load detector 26 for detecting the load received by the stoppers 24a and 24b from the frame 9 is provided inside
a and 26b are attached. Load detector 26
a and 26b are connected to the control device 27 by a cord 34, and the stopper 2 detected by the load detectors 26a and 26b.
The load values received by the frames 4a, 24b from the frame 9 are continuously monitored by the controller 27.

As shown in FIG. 2, a pivot arm mounting member 23 for mounting the pivot arm 12 is fixed to each corner portion of the frame 9, and the other end of the pivot arm 12 is vertically oriented. The inclined loading rod 22 inclined by the angle θ is connected by the connecting pin 35. The inclined loading rod 22 is connected to the pressurizing cylinder 17 and has a structure capable of pressurizing the frame 9. A hydraulic cylinder fixing fitting 28 is fixed to the pressurizing cylinder 17, and is connected by a connecting pin 29 to a slider 30 that is slidable only in the horizontal direction within a guide 31 embedded below the surface where the crushing device is installed.
The slider 30 is connected to a hydraulic cylinder 33 by a connecting rod 32, and the hydraulic cylinder 33 has a structure capable of changing the inclination angle θ of the inclined loading rod 22. Pressure cylinder 17 and hydraulic cylinder 3
3 is connected to the control device 27 by cords 36 and 37, respectively, and the control device 27 can control the pressing force of the frame 9 and the inclination angle θ of the inclined loading rod 22.

At the time of crushing, when the yoke 10 and the crushing ring 1 fixed thereto are rotated during crushing, the crushing roller 2 on the crushing ring 1 is fixedly rotated, and accordingly, the roller 2, the roller bracket 3 and the frame 9 are integrated. Becoming york 1
0 and the grinding ring 1 try to rotate in the direction of rotation.
At this time, when the inclined loading rod 22 of FIG.
2 acts as a force W for pressing the frame 9 downward and a force F for preventing the frame 9 from rotating in the rotation direction of the crushing ring 1 as shown in FIG. Therefore, the force to rotate the frame 9 is received by both the stopper 24 fixed to the housing 19 and the inclined loading rod 22, and compared with the conventional device received only by the wear ring plate 20 fixed to the housing 19. The force acting on the housing is greatly reduced. When the inclination angle of the inclined loading rod 22 with respect to the vertical direction is θ, W and F can be expressed by the following equations.

[0013]

[Equation 1] W = Pcos θ (1)

[0014]

F = Psin θ (2) Therefore, by changing the inclination angle θ of the inclined loading rod 22 and the pressing force P, the force W for pressing the frame 9 onto the crushing ring 1 and the frame are not rotated. The force F to be changed can be changed. In the roller type crushing device according to the present invention, as shown in FIGS. 1 and 2,
Based on the load detected by the load detector 26, the control device 2
The optimum pressurizing force P and inclination angle θ are obtained from the above equations (1) and (2) within 7 and the pressurizing cylinder 1 is set to have these P and θ.
7 and the hydraulic cylinder 33 are controlled. for that reason,
Even if the force for rotating the frame 9 changes, it is possible to always keep the optimum pressing force P and inclination angle θ.

Another embodiment of the present invention is shown in FIG. In this embodiment, the rotation torque of the yoke 10 or the current value of the motor for rotating the yoke 10, specifically, the change of the motor current for rotating the yoke, that is, the torque change is used to act from the frame 9 to the stopper 24 and the housing 19. The load applied to the housing 19 is detected, and the applied pressure P and the tilt angle θ of the tilted loading rod 22 are changed so that the load acting on the housing 19 is minimized. From frame 9 to stopper 24 and housing 19
When a load is applied to the motor, the torque of the motor increases, and the motor current accordingly increases. Therefore, the load applied to the housing 19 can be easily detected from the motor current. Also in this embodiment, the effect is exactly the same as that of the embodiment shown in FIGS.

[0016]

According to the present invention, since the (twisting) load acting on the housing of the roller type crusher is greatly reduced, the plate thickness of the housing can be made thinner than that of the conventional apparatus, and the roller type crusher can be used. Weight reduction of crusher (cost reduction)
It is possible to reduce the vibration of the device.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a roller type crushing device according to the present invention.

FIG. 2 is a side view showing a mounting state of a loading rod of the roller type crushing device according to the present invention.

FIG. 3 is a side view showing another embodiment of the present invention.

FIG. 4 is an overall view of a conventional roller type crushing device.

FIG. 5 is a plan view of a conventional roller type crushing device.

[Explanation of symbols]

1 ... Grinding ring, 2 ... Grinding roller, 3 ... Roller bracket, 4 ... Roller pivot, 9 ... Frame, 10 ... Yoke, 11 ... Reduction gear, 12 ... Pivot arm, 14 ... Supply pipe, 15 ... Classifier, 17 ... Pressure cylinder, 19 ... Housing, 22 ... Inclined loading rod, 24a, 24b
... stoppers, 25a, 25b ... stopper bases, 26a, 2
6b ... Load detector, 27 ... Control device, 30 ... Slider,
31 ... Guide, 32 ... Connecting rod, 33 ... Hydraulic cylinder, 3
4, 36, 37 ... Code.

Claims (3)

[Claims] 1. A crushing ring that rotates in a horizontal plane below a housing, a plurality of crushing rollers that are placed on the crushing ring and rotate while receiving a load vertically downward, and rotatably holding the crushing rollers. Provided inside the housing, a roller bracket for rotating, a roller pivot provided above the roller bracket, a frame provided above the roller pivot, and a frame for transmitting a vertically downward load to the crushing roller via the roller pivot and the roller bracket. Stopper device for restraining the horizontal rotation of the frame,
A roller-type crushing device having a frame and a loading rod for applying a vertically downward load, wherein the loading rod is provided with an inclination angle with respect to the vertical direction, and a device for changing the inclination angle is provided. Roller type crushing device. 2. A crushing ring is rotated in a horizontal plane below the inside of the housing, and a plurality of crushing rollers rotatably held by roller brackets are rotated on the crushing ring while applying a load vertically downward. , The roller pivot provided on the upper part of the roller bracket and the frame provided above it, and the loading rod that pulls the frame downward apply a vertical load to the roller bracket and the crushing roller and rotate the frame in the horizontal direction. In a method of operating a roller-type crushing device that crushes an object to be crushed between a crushing ring and a crushing roller by restraining it with a stopper device provided in the housing, the pulling direction of the loading rod downward is set to the vertical direction. The load applied to the stopper device, and loading based on this detected value. A method for operating a roller-type crushing device, which comprises controlling a tilt angle of a rod and / or a downward pulling force of a loading rod. 3. The method for operating a roller-type crushing device according to claim 2, wherein the load applied to the stopper device is detected by an operating torque of the crushing device or a current value of a motor for operating the crushing device.