JPS6234592Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotational drive device of a raw material uniform supply device that evenly supplies raw materials to a rotary crusher such as a cone crusher or a gyratory crusher, and particularly supplies high-temperature raw materials. The present invention relates to a drive device that can ensure stable operability and high reliability even under adverse conditions such as when operating.

In a conventional rotary type crusher such as a cone crusher, a substantially conical crushing plate 2 is mounted on a main shaft 3 inside a substantially conical cone cave 1, as shown in FIG.
By rotating the cone cave with a certain amount of eccentricity around it, the outlet gap 4 between the crushing plate 2 and the cone cave 1 is changed, and the raw material caught in the gap is crushed under pressure and crushed downward. The pulverized raw material is taken out from the raw material outlet 5. Therefore, if the raw material supplied from the upper raw material supply port 6 is supplied unevenly in the circumferential direction of the crushing plate 2, the amount of wear generated on the surface of the crushing plate 2 and the surface of the cone cave 1 will be uneven. Once such uneven wear occurs, the degree of uneven wear tends to further increase, so that the fracture spots in the product raw material become larger, making it extremely difficult to continue the operation.

From this point of view, in conventional corn crushers, etc., a raw material supply plate 8 inclined at a certain angle is provided in the hopper 7 provided above the raw material supply port 6, and this is rotated. The raw material supplied from the input port 9 slides down along the raw material supply plate 8, so that the raw material is uniformly supplied in the circumferential direction of the crushing plate 2.

However, in the conventional raw material uniform supply device including the raw material supply plate 8 and the like, the raw material supply plate 8 is supported by a cap 10 provided on the upper part of the main shaft 3 via a bearing 11, and is moved from the hopper 7 to the crusher. It is attached to a cylindrical plate 13 rotatably attached to a bracket 12 protruding toward the center, and an electric motor 14 such as a geared motor attached to the upper part of the hopper 7 connects the electric motor and the cylindrical body 13. The raw material supply plate 8 is configured to rotate by the V-belt 15 as the electric motor 14 rotates, but such V-belts 15 and the electric motor 14 generally have low durability against high temperatures, such as drying. When supplying high-temperature raw materials immediately after passing through a process, it has been impossible to use a cone crusher equipped with the conventional raw material uniform supply device as described above.

Therefore, the purpose of the present invention is to eliminate the inconveniences that commonly occur in rotary type crushers such as cone crushers and gyrates crushers as described above, and to solve the problem by using a conical crushing plate that rotates eccentrically. In a device for rotationally driving a raw material uniform supply device disposed above an attached main shaft, a hydraulic motor is fixedly installed in a cap housing an upper bearing that supports the main shaft, and the hydraulic motor and the raw material uniform supply device are connected to each other. An equal supply of raw materials for a rotary type crusher, characterized in that an oil supply and drainage pipe connected to the hydraulic motor is connected to the equipment through a gear, and is arranged in the cap and the upper body that holds the cap. The present invention provides a driving device for the device.

Next, embodiments embodying the present invention will be described in detail. Here, FIG. 2 is a side sectional view of the entire cone crusher including the drive device of the raw material uniform supply device which is an embodiment of the present invention, and FIG. 3 is a hydraulic system diagram of the drive device of the same raw material uniform supply device. In the figures, common reference numerals are used for parts that are the same as those shown in FIG.

In FIG. 2, the main shaft 3 with the crushing plate 2 fixed to the intermediate part has a lower bearing 18 attached to a lower fuselage 17 fixed to the machine base 16, and an upper fuselage 19 fixed to the lower fuselage and having the cone cave 1 inside. The upper step bearing 2 of the piston 22 is eccentrically supported in the radial direction by the upper bearing 20 attached to the upper end and slides in the hydraulic cylinder 21.
3 so as to be rotatable in the axial direction.
A bent bevel gear 24 eccentrically fixed to the main shaft 3
is meshed with a bevel gear 26 fixed to the tip of the drive shaft 25, and rotation of a drive motor (not shown) is transmitted to the main shaft 3 via the drive shaft 25, the bevel gear 26, and the bent bevel gear 24. The upper bearing 20 is attached to the upper end of the upper body 19, and the upper end of the upper bearing 20 is hermetically covered by a cap 10 placed over the upper end of the upper body 19.

The cap 10 has a support shaft 27 projecting upward at the center thereof, and a boss 28 projecting downward from the inclined raw material uniform supply plate 8 is attached to the support shaft 27 via a bearing 29. It is rotatably mounted. A hydraulic motor 30 is fixed to the top surface of the cap 10, and a pinion 31 attached to the drive shaft of the hydraulic motor 30 meshes with a gear 32 formed on the outer periphery of the boss 28 of the raw material uniform supply plate 8. There is. The raw material uniform supply plate 8 has a vertical guide tube 33 integrally formed on its outer periphery, and a portion of the guide tube 33 connected to the lower end of the raw material uniform supply plate 8 is configured to discharge raw materials downward. opening 3
4 is drilled. The raw material uniform supply device A including the raw material uniform supply plate 8 and the like is housed in a hopper 35 disposed at the upper part of the lower body 17, and the guide cylinder 33 has a guide tube 33 with a hopper 35 provided at the outer periphery. A level detection plate 36 that protrudes in the direction is fixed. On the top surface of the cap 10,
A weir plate 37 in the form of an annular wall is provided to surround the boss 28, gear 32, pinion 31, and hydraulic motor 30 therein. Naturally, the said weir plate 37
is included in the internal space of the guide tube 33. The level detection plate 36 detects the amount of raw material input into the hopper 35, and when the raw material has accumulated up to the level a at the lower end of the level detection plate 36, the upper surface of the raw material and the level detection Board 36
The lower end of the level detection board interferes with the rotation of the level detection plate.
In other words, when a load is applied to the rotation of the hydraulic motor and the raw material accumulates above level A, the hydraulic motor stops rotating, and by detecting the overload of the hydraulic motor, the level of the raw material is detected and the raw material is transferred to the hopper. This is to control the supply of water to be stopped.

The drive hydraulic circuit of the hydraulic motor 30 is as shown in FIG.
A hydraulic pump P driven by a motor M is connected in the middle of the oil supply pipe 39, and a gate valve 41 is connected between the hydraulic pump P and the tank T. and filter 42
A pressure gauge 44, a pressure switch 45, and a relief valve 43 are connected to the oil supply pipe 39 between the hydraulic pump P and the hydraulic motor 30, and the secondary side port of the relief valve 43 is connected to the oil supply pipe 39 between the hydraulic pump P and the hydraulic motor 30. Connected to tank T. The pressure switch 45 is switched when the hydraulic motor 30 is overloaded and the pressure inside the oil supply pipe 39 rises above a certain pressure.
This is a switch for stopping the supply of raw materials to the input port 9. Such an overload on the hydraulic motor 30 is caused by the interference between the raw material in the hopper and the level detection plate 36 as described above. relief valve 4
3 is activated when the pressure in the oil supply pipe 39 becomes higher than the pressure for switching the pressure switch 45 described above, and the bearing 29 and the material uniform supply plate 8 are supported by the rotational force of the hydraulic motor 30. This is to prevent damage to the gear 32, pinion 31, etc. Oil supply and drainage pipes 39 and 40 connecting the hydraulic unit 46 containing the pump P, motor M, pressure switch 45, etc. and the hydraulic motor 30 on the crusher body 38 side are bored inside the cap 10 and in the upper body 19. through the through hole 47. Such oil supply and drainage piping is connected to cap 10.
Alternatively, the oil passage may be formed directly in the upper body 19.

The raw material uniform supply device and its driving device configured as described above are operated as follows. When the raw material level in the hopper is lower than level a, the hydraulic motor 30 is rotated by the pressure oil discharged from the hydraulic pump P by the rotation of the motor M, and the raw material uniform supply plate 8
is rotated at a low speed, and the raw material fed from the upper opening of the guide cylinder 33 onto the raw material uniform supply plate 8 is distributed evenly in the circumferential direction by the rotation of the raw material uniform supply plate 8, and the raw material is evenly distributed in the circumferential direction by the rotation of the raw material uniform supply plate 8. The amount of raw material supplied to the gap between the two is equalized in the circumferential direction.
While the raw material is being supplied and crushed in this way, when the raw material level in the hopper rises above level a, the raw material interferes with the level detection plate 36, and a brake is applied to the rotation of the raw material uniform supply plate 8. Therefore, the load on the hydraulic motor 30 increases, and the oil supply pipe 3
The pressure switch 45 is switched due to the increase in pressure within the tank 9, and the supply of the raw material is stopped. Since the hydraulic pump P is still rotating even in this state, the hydraulic pressure in the oil supply pipe 39 further increases, and eventually the relief valve 43 opens and the oil in the oil supply pipe 39 is diverted around the hydraulic motor 30 and into the tank T. Return to. In this way, if the crushing continues with the supply of raw materials stopped, the level of the raw materials will gradually decrease, and eventually the level detection plate 3
6 and the raw material, and the braking force applied to the hydraulic motor 30 is eliminated, the hydraulic motor 30 resumes rotation, and the pressure in the oil supply pipe 39 drops to the normal operating state, so the pressure switch 45 switches. The supply of raw materials begins.

As described above, the present invention is a device for rotationally driving a raw material uniform supply device disposed on the upper part of the main shaft equipped with a conical crushing plate that rotates eccentrically, which accommodates an upper bearing that supports the main shaft. A hydraulic motor is fixed to the cap, and the hydraulic motor and the raw material equalization supply device are connected by a gear, and an oil supply and drainage pipe connected to the hydraulic motor is connected to the cap and the upper body that holds the cap. Since this is a drive device for a material uniform supply device for a rotating type crusher, the performance of the hydraulic motor used and the gears, pinions, etc. that transmit its rotational force are not affected by the ambient temperature. , it is possible to maintain extremely stable operating conditions even when high-temperature raw materials are supplied, and compared to a case where the geared motor and electrical parts, etc., which are easily affected by vibrations and dust, are installed on the crusher main body, the crusher This significantly improves overall reliability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view including a partial crushing cross section of a conventional cone crusher, Fig. 2 is a side sectional view of a rotary crusher including a drive device for a raw material uniform supply device, which is an embodiment of the present invention; The figure is a hydraulic system diagram of the drive device. Explanation of symbols, 1... Corn cave, 2... Crushing plate, 3... Main shaft, 4... Crushing gap, 10... Cap, 19... Upper body, 20... Upper bearing, 3
0... Hydraulic motor, 31, 32... Gear, 39,
40... Oil supply and drainage piping, A... Raw material uniform supply device.

Claims (1)

[Scope of utility model registration request] In a device for rotationally driving a raw material uniform supply device installed on the top of a main shaft equipped with an eccentrically rotating conical crushing plate, a hydraulic motor is fixed to a cap housing an upper bearing that supports the main shaft. The hydraulic motor and the raw material uniform supply device are connected by a gear, and an oil supply/drainage pipe connected to the hydraulic motor is provided in the cap and the upper body that holds the cap. A drive device for a raw material uniform supply device for a rotary crusher.