JPS58104814A - Two body vibrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The invention of B relates to a two-body lifting device, in particular a vibrating screen, a vibrating conveyor, or something similar, and one object is a supporting structure. It is used as a counterbalance that is elastically supported against an object or a base] and also for practical objects, such as a vibrating disk IJ.
The present invention relates to a two-object vibrating device in which the spring and the bell are elastically supported with respect to a counterbalanced weight.

The above-mentioned two-body vibration device used at a high frequency higher than its own resonance frequency is disclosed in West German Patent No. 11E212153.
It is stated in No. 9. A two-body vibrator which is operated above its first resonant frequency has the disadvantage that it enters a state of resonance after t when the operation is terminated. Also, after the operation is terminated, the amplitudes of the practical objects are increased, and these large amplitudes must be calculated higher than the required strength of the two-body vibration device, and these large amplitudes are This occurs especially in vibratory conveyors, where objects are transported when the run is interrupted. This is particularly disadvantageous, since abrupt shutdowns inevitably lead to accidents and failures of the vibrating conveyor.

The stationary parts belonging to a two-body vibrating device, which is part of a vibrating screen or a vibrating conveyor, must be located at a sufficient distance from one practical object to prevent mutual destruction. Hurrying through the area 9
In order to reduce the amplitude of the utility object which is operated at a normal level over time, the utility object is connected to the counterweight via a support with a plurality of dampers.

When constructing this two-body vibrator, it must be kept in mind that the counterweight must vibrate only over a small width in order to keep the losses of the damper low.

The essential drawback of this strain of vibration damping is that: when the natural frequency is reached, the operation is cut off, 2.8
8□1 knee. □□1゜Gloss. This means that a small moving load 1 may occur and have a negative impact on the support.

Shock absorbers, which are usually hydraulic, are prone to failure and a very small leak can dramatically reduce or even cause them to fail. If one has reduced functionality, the entire two-body vibrator will vibrate uncontrolled in the same position, and this position will suffer serious damage.

For reasons detailed above, multiple shock absorbers are often mentioned in West German Patent No. 2,121,539.
'As such, it must be inspected and replaced.

The present invention was made based on the above circumstances, and an object of the present invention is to sufficiently vibrate in the resonance region without requiring a special device such as a shock absorber or brake, which itself tends to cause failures and adversely affects operation. It is an object of the present invention to provide a two-object vibrating device having a simple configuration, which can absorb the vibration and suppress the dangerously high amplitude of a practical mass.

In this invention, the counterbalance 19 is at least one chamber filled with a granular mixture or a mixture of a granular mixture and a permanent viscosity binder, and the amount of the empty part in the chamber is proportional to the filled part. The relationship is 1:0.2 to 1
=31 preferably 1:2 to 1:2.5. Must be between. The binder has a concentration of 10 to obtain a high buffering effect.
It is preferable that the viscosity is 0 Cp (IPa·S).

At the operating frequency, the balance mass usually oscillates only with very small amplitude, and the acceleration acting on the balance tJ is relatively small and the acceleration due to gravity is also small. At the operating frequency, where there is no relative movement or movement between the granular mixture and the balance MB, the mixture of granules W and the balance MB are one object, i.e. At least they act as if they were connected.

If the amplitude of the balance 1 increases, it approaches the resonant frequency, so the acceleration acting on the balance 9 becomes large, exceeding the acceleration of 1 force, and the granular mixture Perform a free jump without making contact with the floor in the room.

The energy from the two-body vibrator is recovered by its jumping, which causes the granular mixture that is buffered to fly off.
From the threshold until impacting the ceiling in the chamber, a decrease in the value of the mass of the counterbalanced mass, i.e. the resonant frequency response, - takes place, where the resonant frequency changes consistently and the balance 1 This prevents excessive vibrations from occurring.

By using this two-body vibration device, the buffering effect does not function during normal operation and no special table energy is required, and the resonance region is quickly passed through and the operation is interrupted during operation. If this happens, a damping effect will function to dampen the increase in amplitude. First of all, this two-body vibrator does not require any control or maintenance, and there is no risk of sudden loss of damping.

According to a further feature of the invention, the granular mixture comprises:
Pellets with a size of less than 1.5 to 3
Pellets with a bulk weight of 1.8 to 2,3 t/m, preferably with a bulk weight of 1 to 5 t/m, and in any case of 4 t/m' However, a large amount of energy can be buffered through the resonant region.

Percentage of filling in all chambers is 50 to 95
H, preferably 70 to 80%.

% is advantageous when . It is also advantageous if the shape of the pellets is similar to that of crushed shells.

Embodiments of the present invention will be described below with reference to the drawings.

The counterbalance 1, which is supported by a number of springs 7 on the base, mainly consists of two hollow parts provided in the front side of a plurality of elongated boxes connected to each other. The two hollow parts are divided into a plurality of chambers by a plurality of sections. In balance *, tzJ:, a vibrating screen 4 is supported on a plurality of springs 5. It goes without saying that the rotation is not carried out by one shaft which is driven by the reciprocally driven lumen shaft by the Cardan shaft 8, but by means of a gear system which reverses the direction of rotation. Nor.

As can be seen from FIG. 3 and FIG.
Partially filled with a filling rate of

The filling factor may be lower than this value, for example approximately 50 cm.The filling material may be sand, for example, and 9.1.8
10 with a volumetric weight of 2.3 to 2.3 t/m3
(2) Pellets with the following dimensions, preferably in the shape of crushed shells, the relationship of the object of the configuration of the counterweight to the filling ratio should be about 1:2. Then, as soon as the granular mixture 2 jumps up from the floor in the chamber of the balance mass 1, the mass of the balance mass 1 changes significantly and influences the value of the mass for the resonance frequency. As can be seen from FIG. 3, an acceleration force smaller than the l force has an effect on a vibrating screen having an operating frequency greater than the resonant frequency of the counterweight 1. As a result, the granular mixture 2 on the floor of the elongated box chamber becomes stationary and as if connected.

When operating through the resonance region, if balance 1 series 1
When a very large vibration is caused by the connection of the counterbalances 1 and 1, the upward acceleration force affects the granular mixture 2, and the granular mixture 2 moves into the elongated box as shown in FIG. Begins to leave the floor of the room. As a result, the effective mass at the moment of equilibrium changes, and so does its resonant frequency.

Also, the granular mixture 20 Katamashi jumps from the floor of the room to the ceiling of the room, and the movement is stopped 2
The energy that accelerates the damage to the two-body peristaltic system is absorbed from the physical vibration device.

Due to this effect, a high degree of attenuation is achieved. The above-described embodiments are for illustrating the present invention, and are not intended to limit the present invention in any way, and within the technical scope of the present invention. It goes without saying that all modified, modified, etc. products are also included in the present invention.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the invention; FIG. 2 is a front view of an embodiment of the invention; FIGS. 3 and 4 show the balance 1 operating in the resonance region. It is a vertical cross-sectional view schematically showing;

Claims (1)

[Claims] 1. It has a vibrating frame and a vibrating conveyor or something similar, in which one object is elastically supported with respect to a support structure or a base. It is used as a counterbalanced shell, in which a practical object, such as a vibrating screen, is elastically supported on the counterbalanced shell, and the counterbalanced shell (1) is a granular or a mixture of a granular mixture and a permanent viscosity binder, at least one chamber filled with a mixture of a granular mixture and a permanent viscosity binder, the relationship of the amount of empty space to filled space in the chamber being from 1:0.2 to 1. : 3, preferably 1:
2 to 1:2.5. A two-object vibration device characterized in that the vibration must be between two objects. 2. Permanent viscosity binder is 1000 Cp (1 pa・s
2. The two-object vibrating device according to claim 1, wherein the two-object vibrating device has a viscosity of: ). 3. The granular mixture is pellets with a size of 10 mm or less and has a volumetric weight of 1.5 to 3 t/m2, preferably 1 to 5 mm, and 1. The two-object vibration device according to claim WX1 or @2, characterized in that it has a volumetric weight of 8 to 2.3 t/sys'. 4. The two-object vibration device according to any one of claims 111 to 3, characterized in that the let has a shape like a crushed shell. 5. The balanced type chamber is 50 to 9 depending on the granular mixture
A two-body vibrating device according to any one of claims 1 to 4, characterized in that it is filled by 5%, preferably from 70 to 80-1.