JP2652492B2 - Crushing plant 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 driving device for a crushing plant , and more particularly to a driving device for a crushing plant in which a crusher is mounted on a cradle provided with a crawler.

[0002]

2. Description of the Related Art Conventionally, a crusher is mounted on a base provided with a crawler.
As the driving device of the crushing plant equipped with, the electric motor is rotated by the electric power generated by the engine mover,
A crusher and a conveyor that drives a crawler such as a conveyor are known (Japanese Patent Application Laid-Open No. 63-77553).

[0003] In this type of crushing plant driving device,
When the crusher is started, an excessive load may be applied to the engine generator, which may hinder the smooth operation of the engine generator.

[0004]

However, in the above-mentioned conventional construction, the driving power of the crusher is used for the output of the engine under the combined efficiency of the generator and the electric motor. The fuel cost of the engine and the equipment cost.

Further, in a drive device or the like in which an electromagnetic clutch or the like is connected to an engine, an excessive impact load is applied to the engine or the electromagnetic clutch when the crusher is started, which may cause early damage. However, no device for removing these occurrences is provided, which is not preferable.

The present invention has been made to solve the above-mentioned problems of the prior art. When the crusher of the crushing plant is started, the crusher is started slowly by the joint means, and the start of the crusher and It is an object of the present invention to provide a driving device for a crushing plant that can effectively prevent an excessive load from being applied to an engine when an abnormal load occurs during rated operation.

[0007]

In order to achieve the above object, according to the present invention, there is provided an engine, a distributor connected to an output end of the engine and having a plurality of output shafts, and an output shaft of one of the distributors. is connected, a first coupling means <br/> Ru connect or disconnect the drive of the crusher, provided on the output shaft side of the first coupling means, the engine performs the operation slip when starting the crusher, and the first joint Second coupling means for preventing overload on the means , and a hydraulic port connected to another output shaft of the distributor and selectively driving the crawler and the equipment of the crushing plant.
It is characterized by comprising a hydraulic circuit with a pump,
The drive unit of the crushing plant includes the engine idling
A predetermined time has passed since the first coupling means was connected at the speed
After that, the engine speed and crusher speed are constantly detected
The speed difference between the engine and the crusher is
The first joint and cut the engine
It is characterized by comprising a control unit for stopping .

[0008]

In this way, when the crushing machine of the crushing plant is started, the sliding operation is performed, the first coupling means is connected at the idle speed of the engine, and the rotation speed of the engine is gradually increased. The rotation speed of the crusher gradually increases due to the operation of the two joint means, and after a predetermined time has elapsed, the crusher rotation speed is shifted to the rated operation without applying an excessive load to the engine and the first joint means. Further, when an abnormal load is applied to the crusher, by detecting an abnormality in the rotational speed of the crusher, the first coupling means is automatically cut off , and the engine is stopped. In any case, an excessive load on the engine can be effectively prevented, and the crusher of the crushing plant can be smoothly driven. In addition, control
Crawler and crushing plan by operating hydraulic circuit by section
Device can be selectively driven.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a crushing plastic showing one embodiment of the present invention.
Circuit diagram of the cement of the drive unit, FIG. 2 is a startup curve diagram of the drive unit.

1 and 2, in a crushing plant in which a crusher 30 is mounted on a gantry provided with crawlers 40 and 42, a driving device 1 is used.
2 for power transmission of the engine 10 to the equipment of the crushing plant .

A distributor 12 is provided at the output end of the engine 10, for example, a diesel engine. The output of the engine 10 is supplied to a first output shaft 14 and a second output shaft 1 comprising two shafts.
6, 18 respectively. For driving the first output shaft 14 crusher 30, and the second output shaft 16, 18 selects the hydraulic equipment such as crawler 40, 42 or crushed plant
It is used for driving the hydraulic pumps 32 and 34 of the hydraulic circuit that is to be driven .

The first output shaft 14 is connected to a drive shaft 20, and the drive shaft 20 is connected to first coupling means 22, for example, an electromagnetic clutch.
The coupling means 26 is connected to, for example, a centrifugal clutch, and the driven side of the centrifugal clutch 26 is connected to the input shaft 29 of the crusher 30 via a transmission means, for example, a V-belt or the like. Are formed.

The second output shafts 16 and 18 are respectively connected to the hydraulic pump 3
The high-pressure hydraulic fluid, which is connected to the hydraulic pumps 32 and 34 and is generated by driving the hydraulic pumps 32 and 34, forms a hydraulic circuit for driving the traveling devices of the crawlers 40 and 42 through the hydraulic manifolds 36 and 38, and Another hydraulic circuit for driving hydraulic motors 46 and 48 serving as driving sources for a crushing plant conveyor and the like via a switching valve via hydraulic manifolds 36 and 38 is formed.

The control unit 50 starts the engine 10, and controls the connection or disconnect such driving operation of the driving device 1 of the stop and the electromagnetic clutch.

The engine 10 is started by operating the control unit 50, and is operated at an idling rotational speed. The electromagnetic clutch 22 is in a disconnected state, only the input shaft of the first output shaft 14 and the drive shaft 20 and the electromagnetic clutch 22, while being rotated, the hydraulic pump 32 is driven by the second output shaft 16, 18 The hydraulic pressure of the hydraulic circuit is generated.

The traveling mode of the control unit 50 is selected, the engine 10 is raised to the rated rotation speed by the operation of the governor motor by the operation of a button, and the control of the control unit in the hydraulic circuit controls the traveling of the crawlers 40 and 42. Will be

When the crushing mode of the control unit 50 is selected and the hydraulic equipment such as the conveyor of the crushing plant and the vibrating sieve are started by button operation, and then the crusher 30 is started by another button operation, based actuates the governor motor of the engine 10 at time t ₂ by a timer operation from by continuous to (indicating at time t ₁₎ of about 0.1 seconds by the excitation of the electromagnetic clutch 22 in the signal 58, the engine 1
Rotational speed of 0 is gradually from the idle rotational speed n _1, leading to increased. Thus, the torque output shaft 24 of the electromagnetic clutch 22 corresponding to the rotational speed of the engine 10 by the operation of the engine revolution clutch 26 is transmitted to the crusher 30, the input shaft 29 of the crusher 30 slowly from the rotational speed n _co To rise.

In FIG. 3, the relationship between the transmission torque of the centrifugal clutch 26, the output torque of the engine 10 and the rotation speed is shown, and the load of the engine 10 is gradually increased from 0 as the rotation speed n increases. The electromagnetic clutch 22 is prevented from receiving an excessive impact load.

Referring again to FIGS. 1 and 2, the centrifugal clutch 2
The engine 6 is operated under a slip condition until the crusher rotation speed is balanced with the engine rotation speed, and the engine 10 is operated under the rotation speed n ₃ , that is, the transmission torque of the engine 10 and the centrifugal clutch. It is rotated at the equilibrium point rotation speed of the transmission torque of No. 26. After the rotation speeds of the engine 10 and the crusher 30 become equal, the engine 10 reaches the rated rotation speed n ₅ , the centrifugal clutch 26 completes the slip state, and the rotation speed of the crusher 30 is set to n _C5. Rotated at the same speed. Thus, the buffered start-up is completed smoothly without imposing an excessive load on the engine 10, and subsequently, the operation is shifted to the normal rated operation, and the crushing of the material is started.

On the other hand, the engine 10 and the crusher 30 (represented by the centrifugal clutch 26) have a speed sensor 52,
54 comprises respectively, its output signal is inputted to the control unit 50, the predetermined time from the time point t ₁ where the electromagnetic clutch connected to, for example, about 25 seconds elapsed time t ₆ after the detection of each of the speed is performed.

[0021] In FIG. 2, the driven side of the centrifugal clutch 26 is that shown by the dotted line, i.e., an excessive load is generated in the crusher 30, the increase in the rotational speed of the engine 10 and the crusher 30 from the time point t ₁ Not smoothly, speed difference ΔN = n-
n _c is equal to or higher than a predetermined speed difference, which detects the presence of the abnormal state. Abnormality detection signal in the control unit 50, by disconnecting and demagnetize the electromagnetic clutch 22 by the signal 58, to stop the crusher 30, the engine 10 is stopped by the signal 56, engine 10, O and started crusher 30 To protect equipment from damage. Then, at the time point t ₆ and later, if the rotation speed n and n _c is a prescribed speed than prescribed speed, and detects that in the normal state, if above, detects that it is in an abnormal state the engine 10 is stopped with disconnecting the electromagnetic clutch 22 Te. Thus, it is possible to prevent the engine 10 from being overloaded.

[0022]

As described above, according to the present invention,
The crusher can be started gently and smoothly by the coupling means that performs a sliding operation when the crusher of the crushing plant having a large moment of inertia is started, so that an excessive load on the engine can be effectively prevented.

Further, when an abnormal condition occurs in the crusher, the abnormal condition is detected and the operation of the crusher, the engine and the hydraulic equipment of the crushing plant is stopped, so that damage to these devices can be protected. . Furthermore, crusher, it is driven by the engine directly, crushed plan
It has a great effect such as a reduction in the operating cost of the vehicle.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a driving device of a crushing plant showing an embodiment of the present invention.

FIG. 2 is a startup curve diagram of the drive device.

FIG. 3 is an explanatory diagram of the second joint means, an engine torque and a rotation speed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive device 10 Engine 12 Distributor 14 1st output shaft 16, 18 2nd output shaft 20 Drive shaft 22 1st coupling means 24 Intermediate shaft 26 2nd coupling means 28 Transmission means 30 Crusher 40, 42 Crawler 50 Control part

Claims (2)

(57) [Claims] 1. An engine, a distributor connected to an output end of the engine and having a plurality of output shafts, and first coupling means connected to one output shaft of the distributor to connect or disconnect a drive of the crusher. And the first coupling means is provided on the output shaft side and performs a sliding operation at the time of starting the crusher to perform the engine and the first
Second joint means for preventing overload on the joint means;
It is connected to the other output shaft of the distributor, and a hydraulic pump for selectively driving the device of the crawler and fracture <br/> crushing plant
A driving device for a crushing plant, comprising a hydraulic circuit provided with the hydraulic circuit. 2. The driving of the crushing plant according to claim 1.
In the device, the drive device constantly detects the engine speed and the crusher rotation speed after a predetermined time has elapsed from the time when the first coupling means is connected at the engine idle rotation speed, and determines the connection between the engine and the crusher. If the speed difference is equal to or greater than a predetermined speed difference, while cutting the first joint, fracture characterized by comprising a control unit for stopping the engine
Of the crushing plant .