JP2576043B2 - Wear reduction device in stalker drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wear reducing device for a stoker driving device such as an incinerator and a combustion furnace for refuse and other waste.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a step-shaped stoker in a conventional refuse incinerator disclosed in Japanese Utility Model Publication No. 3-3787. The stoker is a horizontal reciprocating type in which a movable grate 10 and a fixed grate 12 are installed in a stepwise manner in the direction of waste flow.
The fixed grate 12 is mounted on a fixed frame 16, and these grate are fitted side by side on a stoker receiving shaft extending in the furnace width direction. The movable frame 14 moves on rails 18 provided on the fixed frame 16 via wheels 20. That is, the movable frame 14 is reciprocated upward from the hydraulic cylinder (not shown) in the upward direction with respect to the horizontal through the liner 28 by the accumulation force of the drive roller 26 via the drive shaft 22 and the roller arm 24. And the movable grate 10
Also reciprocates upward with respect to the horizontal to advance the burnable matter such as dust.

In the conventional staircase type stalker shown in FIG. 9, the drive roller 26 turns around the drive shaft 22, and the trajectory of the turn does not change under the influence of others. On the other hand, as shown in FIGS. 10 to 12, the movable frame 14 moves on the rail 18 via the wheel 20, and the trajectory of the movable frame 14 in the front-rear direction is regulated by the flange 21 of the wheel 20 and the guide roller 30. Then, the center of the movable frame 14 and the center of the drive shaft 22 are substantially perpendicular to each other, and the contact between the drive roller 26 and the liner 28 is kept in line contact. The driving force is evenly transmitted to the liner 28. 32 is a guide rail, 33 in FIG. 9 is a roller bracket, 35
Is a roller shaft.

[0004]

However, in practice, it is always movable due to the resistance of the grate, the driving resistance, the assembly error, the gap between the guide roller 30 and the guide rail 32, the gap between the flange 21 of the wheel 20 and the rail 18, and the like. It is difficult to keep the center line 34 of the frame 14 and the center line 36 of the drive shaft 22 at right angles. Center line 34 of movable frame 14
When the relationship between the drive roller 26 and the center line 36 of the drive shaft 22 is not a right angle, the relationship between the drive roller 26 and the liner 28 becomes as shown in FIG.
3 and the drive roller 26 and the liner 2
8 are mutually biased, and are not in line contact but are in extreme contact, resulting in an abnormally high pressure in the contact portion, leading to faster wear.

[0005] The present invention has been made in view of the above points,
An object of the present invention is to prevent the eccentric load from acting on the liner even when the center of the movable frame and the center of the drive shaft are not perpendicular to each other, that is, to prevent the pole load from acting.
It is an object of the present invention to provide a wear reduction device in a stoker drive device in which a drive roller and a liner are always in free line contact.

[0006]

In order to achieve the above-mentioned object, the present invention provides a stalker driving apparatus which includes a wear reduction device for driving a movable frame provided with a movable grate with a driving roller for transmitting a driving force from a driving source. In the stalker drive device that reciprocates in the front-rear direction through the liner by turning the liner, the outer surface of the liner is a curved surface of a substantially arc-shaped concave portion, and the curved surface of the liner has the same curved surface as the curved surface. A substantially convex curved surface seat that comes into surface contact with the movable frame, and attaches the substantially convex curved surface seat to the roller bracket of the movable frame, so that the liner always moves even when the curved surface of the liner moves along the substantially convex curved surface seat. A spring is stretched between the liner and the roller bracket so that the drive roller and the liner receiving the driving force are always in line contact with each other so that the drive roller and the liner receiving the driving force can be pressed against the substantially convex curved surface seat. It is characterized.

In the above-described wear reducing device, a key groove for positioning the substantially convex curved surface seat is provided on the roller bracket, a key of the substantially convex curved surface seat is inserted into the key groove, and a bolt is attached to the roller bracket. So that the substantially convex curved surface seat can be replaced, and the curved surface of the substantially arc-shaped concave portion and the substantially convex curved surface seat of the liner are hardened so as to have wear resistance. It is preferable to configure.

A spring is stretched between a hook attached to the roller bracket and a pin provided on the liner so that the spherical contact portion does not separate, and the hook is fixed to the roller bracket by a double nut. Preferably, the double nut adjusts the tension of the spring and the angle of the liner surface.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. However, the shapes of the constituent members described in this embodiment, the relative arrangement thereof, and the like are not intended to limit the scope of the present invention only to them, unless otherwise specified. It's just FIG. 1 shows a main part of a stair stoker type waste incinerator provided with the wear reduction device of the present invention, FIG. 2 shows a side surface around a driving roller, and FIG. 3 shows a view seen in the direction of arrow A in FIG. Is shown. Movable frame 14 with movable grate 10
Is reciprocated in the front-rear direction via a liner 40 by turning a drive roller 26 that transmits a driving force from a drive source (not shown) such as a hydraulic cylinder via a drive shaft 22 and a roller arm 24.

As shown in FIGS. 4 and 6, an outer surface of the liner 40 is formed on a curved surface 42 of a substantially arc-shaped concave portion, and a spherical seat, specifically a substantially convex shape, which comes into surface contact with the curved surface 42 of the liner. A curved seat 44 is provided, and the substantially convex curved seat 44 is attached to the roller bracket 33 of the movable frame 14,
Even if the curved surface 42 of the liner moves along the substantially convex curved surface seat 44, the liner 40 is always pressed against the substantially convex curved surface seat 44. Specifically, liner 4
A spring 46 is extended between the roller bracket 33 and the roller bracket 33 so that the liner angle can be freely changed so that the driving roller 26 and the liner 40 receiving the driving force are always in line contact.

FIG. 5 shows an example of a substantially convex curved surface seat 44. The substantially convex curved surface seat 44 has a key 48 on the opposite side of the curved surface, and has a bolt insertion hole 50 penetrating the key 48 from the curved surface. And, as shown in FIG.
A key groove 52 is provided in the roller bracket 33, the key 48 of the substantially convex curved surface seat 44 is inserted and positioned in the key groove 52, and a bolt 54 is inserted into the bolt insertion hole 50 to be fixed to the roller bracket 33. It is composed. By doing so, it is possible to provide a structure in which the substantially convex curved surface seat 44 can be replaced.

The curved surface 42 of the liner 40 and the surface of the substantially convex curved surface seat 44 have the same curved surface and are brought into surface contact so that the driving force from the driving roller 26 can be received at a low surface pressure. I have. In addition, the liner 40 and the substantially convex curved surface seat 4
4 is hardened to have abrasion resistance. The spring 46 is stretched between a hook 56 attached to the roller bracket 33 and a pin 58 provided on the liner 40, and the liner 40 freely moves on the substantially convex curved surface seat 44. Also, with a moderate force, the substantially convex curved seat 44 is always used.
, So that the spherical contact portion does not separate (see FIG. 2).

The hook 56 is fixed to the roller bracket 33 by a double nut 60, and the tension of the spring 46 and the angle of the liner surface can be adjusted by the double nut 60. Also, liner 40
A liner receiving member 62 is attached to the lower surface of the roller bracket 33 in order to support the lower surface of the liner 40 so that does not move downward by its own weight. Reference numeral 64 denotes a liner receiving member mounting bolt.

FIG. 6 shows a case where the center of the movable frame and the center of the drive shaft are at right angles. In this case, the center of the roller shaft 35 and the center of the roller bracket 33 are also perpendicular to each other, and the curved surface 42 of the liner 40 and the surface of the substantially convex curved seat 44 are brought into surface contact with each other to receive a driving force. The liner 40 can be moved so that the liner 40 is always in line contact with the liner 40. 7 and 8 show a case where the center of the movable frame and the center of the drive shaft are not perpendicular. FIG. 7 shows the case where the rear side of the movable frame leans to the left and the front side leans to the right, and FIG. 8 shows the case where the rear side of the movable frame leans to the right and the front side leans to the left. In any case, the curved surface 42 of the liner 40 and the surface of the substantially convex curved surface seat 44 are brought into surface contact to receive a driving force, and the liner 40 is moved so that the driving roller 26 and the liner 40 are always in line contact. can do.

[0015]

As described above, the present invention has the following effects. (1) Since the driving roller transmitting the driving force from the driving source and the liner receiving the driving force are always in line contact, an uneven load is applied to the driving roller and the liner.
The extreme load does not act, thereby reducing the wear of the drive roller and the liner. (2) Due to the above effects, the transmission of the driving force around the driving roller is performed extremely smoothly.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a wear reducing device in a stalker drive device of the present invention.

FIG. 2 is an enlarged side view of a main part in FIG.

FIG. 3 is a diagram viewed in the direction of arrow A in FIG. 2;

FIG. 4 is a bottom view of the device shown in FIG.

FIG. 5 is a perspective view showing an example of a substantially convex curved seat used in the apparatus of the present invention.

6 is a cross-sectional view taken along line BB in FIG. 2, showing a case where the center of the movable frame and the center of the drive shaft are at right angles.

7 is a cross-sectional view taken along the line BB in FIG. 2, showing an example in which the center of the movable frame and the center of the drive shaft are not perpendicular.

FIG. 8 is a cross-sectional view taken along the line BB in FIG. 2, showing another example in which the center of the movable frame and the center of the drive shaft are not perpendicular.

FIG. 9 is a side view showing an example of a conventional stalker driving device.

FIG. 10 is a bottom view showing a normal relationship between a driving roller and a liner in the apparatus shown in FIG. 9;

FIG. 11 is a side view of a wheel, a rail, and a driving roller in FIG. 10;

FIG. 12 is a side view of a guide roller and a guide rail in FIG. 10;

13 is a bottom view showing a case where the center of the movable frame and the center of the drive shaft are not perpendicular to each other in the device shown in FIG. 9;

[Explanation of symbols]

 Reference Signs List 10 movable grate 12 fixed grate 14 movable frame 16 fixed frame 18 rail 20 wheels 21 flange 22 drive shaft 24 roller arm 26 drive roller 33 roller bracket 35 roller shaft 40 liner 42 curved surface 44 substantially convex curved surface seat 46 spring 48 Key 50 Bolt insertion hole 52 Key groove 54 Bolt 56 Hook 58 Pin 60 Double nut 62 Liner receiving member

Claims (3)

(57) [Claims] 1. A stoker driving device that reciprocates a movable frame having a movable grate attached thereto in a front-rear direction through a liner by rotating a driving roller that transmits a driving force from a driving source. Is a curved surface of the substantially arc-shaped concave portion, a curved surface of the liner is provided with a substantially convex curved surface seat that has the same curved surface as the curved surface and is in surface contact with the curved surface.
The substantially convex curved surface seat is attached to the roller bracket of the movable frame, and the liner is always pressed against the substantially convex curved surface seat even if the curved surface of the liner moves along the substantially convex curved surface seat. A spring is stretched between the roller bracket and the roller bracket so that the driving roller and the liner receiving the driving force are always in linear contact with each other, the wear reducing device in the stalker driving device. 2. A key groove for positioning the substantially convex curved surface seat on the roller bracket, a key of the substantially convex curved surface seat is inserted into the key groove, and the roller bracket is attached to the roller bracket with bolts. The structure is such that the substantially convex curved surface seat can be replaced, and the curved surface of the substantially arc-shaped concave portion and the substantially convex curved surface seat of the liner are configured to be hardened and have wear resistance. The wear reducing device in the stalker drive device according to claim 1. 3. A spring is stretched between a hook attached to the roller bracket and a pin provided on the liner, and the hook is fixed to the roller bracket by a double nut, and the tension of the spring and the surface of the liner are fixed by the double nut. The wear reducing device in the stalker drive device according to claim 1 or 2, wherein the angle of the stoker drive device is adjusted.