RU2365430C1 - Device for vibration excitation - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention refers to vibration engineering and may be used for excitation mechanical vibrations. The device for vibration excitation includes striker mounted on guides with possibility of force interaction with anvil. The striker is connected with gear motor shaft via driving drum-type cam gear with push-rod mounted on striker and interacting with working surface on cam butt-end. The striker is enabled to travel linearly and has central chamber inside which cam is installed. The cam is connected with motor gear shaft via free-wheeling clutch. Additionally, the striker is made with head placed in direction of the anvil at the centre of its force impact. The push-rod may be installed with possibility to change position of its installation along the striker travel axis, also the push-rod may be spring-loaded in direction of the anvil and enabled to be shifted by the cam on which additional stops are installed to limit push-rod stroke.

EFFECT: energy saving, increase in stability and providing adjustment of energy amount of vibrations created by the device in vertical direction when using power sources of moderate capacity.

3 cl, 4 dwg

Description

The proposed device relates to vibration technology and can be used to excite mechanical vibrations. The most effective application of the present invention for the excitation of seismic vibrations when using a low power consumption of the device.

A device for exciting vibrations, containing an electric motor, on the shaft of which is located a wheel in contact with the rail. Moreover, the wheel rim is made in the form of an open magnetic circuit with an excitation winding, and the rail is made of magnetic material (see RF patent No. 2024329, publ. 15.12.94 Bull. No. 23). However, with this device, it is impossible to obtain fluctuations of significant power with a small power supply energy of the device.

Known devices for exciting vibrations, which use a change in static moment by using retractable unbalances mounted on a drive shaft (see RF patent No. 2184623, publ. July 10, 2002 Bull. No. 19). However, these devices have a complex structure and control, and also do not provide a vertical direction of vibration and require significant power supply.

A device for exciting vibrations (see RF patent No. 2204444, publ. 05.20.2003 Bull. No. 14), containing a hammer, made in the form of a ball mounted inside the housing and moved by a carrier made in the form of a rod. Energy is transmitted to the ball as a result of the rotation of the carrier, which leads to force interactions of the striker with the body and the occurrence of vibrations. The disadvantages of this device are the low stability of the excited oscillations, the low energy of the generated oscillations.

The closest of the analogues is a device for exciting vibrations (see the brochure of the company Magal (Israel)), containing a drummer mounted on cruciform guides. A pusher is mounted on the hammer, which interacts with the working surface at the end of the cam installed in the device’s body around the hammer. The cruciform guides communicate the rotational movement of the gear motor. In this case, the pusher, moving along the surface of the cam, raises the hammer, storing potential energy in it. At the end of the stroke, the cam and pusher are disconnected. The drummer makes a free fall. As a result of the force interaction of the striker with the anvil, shock mechanical vibrations are excited.

In this device, the firing pin is diverted from the anvil, performing a rotational movement and spending additional energy to overcome its moment of inertia around the axis of rotation, which reduces the efficiency of the device. High energy costs in its practical application are also associated with the lack of adjustment, the ability to automatically adjust the magnitude of the required energy characteristics of mechanical vibrations. In addition, the location of the striker around the guides leads to its non-optimal force interaction with the anvil at the time of impact, since the collision is carried out on the surface, which does not allow the potential energy stored by the striker to be transferred to the maximum possible energy of mechanical vibrations.

The objective of the invention is energy saving, increasing stability and providing adjustment of the amount of energy generated by the device vibrations in the vertical direction when using a low power source.

This object is achieved by the fact that in the proposed device for exciting mechanical vibrations, including a hammer mounted on guides with the possibility of force interaction with the anvil and connected to the shaft of the gear motor drive cam drum mechanism with a pusher mounted on the hammer and interacting with the working surface on the cam end, the hammer is linearly movable and has a central cavity inside which a cam is connected, connected to the shaft m Torr gear through the overrunning clutch.

The pusher can be installed with the possibility of changing its position along the axis of movement of the striker. In addition, the pusher can be spring-loaded towards the anvil and made with the possibility of its movement with a cam, on which additional stops are installed that limit the stroke of the pusher.

An example implementation of the proposed device is shown in figure 1.

The device consists of a housing 1, a gear motor 2, an overrunning clutch 3, an output shaft 4 of the drive, a cam 5, guides 6, a hammer 7, anvil 8, a hammer 9 and a pusher 10. A drive mechanism consisting of a gear motor is fixed to the housing 1 2 and overrunning clutch 3. Cam 5 is fixed on the output shaft 4. Drummer 7 is mounted on guides 6 with the possibility of linear movement and force interaction through the hammer 9 with the anvil 8. In addition, a pusher 10 is mounted on the hammer 7, which interacts with the working surface on the cam end 5.

A variant (FIG. 2) of the pusher 10 is possible when it is spring-loaded towards the anvil 8 with the possibility of moving it with the cam 5. Its stroke limits the stop 11 mounted on the hammer 7.

The device operates as follows. In the initial position (Fig. 1, pos. A), the pusher 10 is fixed on the hammer 7 and does not come into contact with the working surface at the end of the cam 5. The hammer 7 occupies the lowest position and abuts against the anvil 8 with the striker 9.

On command to initiate mechanical vibrations, the gear motor 2 is turned on, creating a rotational movement of the cam 5 in a clockwise direction. The interaction of the pusher 10 with the working surface at the end of the cam 5 leads to a linear movement of the hammer 7 along the guides 6 relative to the anvil 8 (Fig. 1, item b). After the pusher 10 passes the extreme upper position on the cam 5, the overrunning clutch 3 is actuated, the cam 5 is additionally rotated clockwise, and the pusher 10 is disconnected from the working surface at the end of the cam 5. The hammer 7 makes a free fall (Fig. 1, item c) and strikes briskly 9 on the anvil 8, exciting mechanical vibrations.

The above description of the device of the invention is an example of its implementation. Possible embodiments of a device for exciting vibrations depending on the need to adjust the magnitude of the required energy characteristics of mechanical vibrations (figure 2).

In this case, the device operates as follows. In the initial position (Fig. 2, pos. A), the pusher 10 is not fixed on the hammer 7, occupies the lowest position relative to the hammer 7 and does not come into contact with the working surface at the end of the cam 5. The hammer 7 occupies the lowest position and abuts the anvil 9 in the anvil 8.

On command to initiate mechanical vibrations, the gear motor 2 is turned on, creating a rotational movement of the cam 5 in a clockwise direction. The interaction of the pusher 10 with the working surface at the end of the cam 5 leads to a change in the position of the pusher 10 relative to the hammer 7. The pusher 10 moves the cam 5 up, and the hammer 7 remains stationary. The positioning of the pusher 10 on the abutment 11 subsequently leads to the movement of the hammer 7 along the guides 6 relative to the anvil 8 (figure 2, position b). After the pusher 10 passes the extreme upper position on the cam 5, the overrunning clutch 3 is actuated, the cam 5 is additionally rotated clockwise, and the pusher 10 is disconnected from the working surface at the end of the cam 5. The drummer 7 makes a free fall (Fig. 2, item c) and strikes briskly 9 on the anvil 8, exciting mechanical vibrations.

Thus, the proposed technical solution in comparison with the known has the following advantages:

- elimination of the rotational movement of the projectile during the accumulation of potential energy and at the time of excitation of mechanical vibrations by it reduces the energy consumption of the device and increases the stability of the characteristics of the excited waves;

- improving the efficiency of the proposed device is provided by the introduction of the striker with its optimal parameters for energy transfer during power interaction with the anvil;

- the implementation of settings, the ability to automatically adjust the magnitude of the required energy characteristics of mechanical vibrations expands the versatility of the device in its practical application.

In laboratory conditions, at the Department of Automation of Production Processes of VlSU and the production conditions of FSUE NII “ATOLL”, an industrial design of the proposed device was tested (Fig. 3).

Field tests have confirmed the simplicity of the design, the control system, the effectiveness of the technical solution.

Figure 4 shows a device for exciting vibrations of the company Magal (prototype).

Claims (3)

1. A device for exciting vibrations, including a hammer mounted on guides with the possibility of force interaction with the anvil and connected to the shaft of the gear motor with a drive drum type cam mechanism with a pusher mounted on the hammer and interacting with the working surface at the cam end, characterized in that the hammer is linearly movable and has a central cavity, inside which a cam is mounted, connected to the shaft of the gear motor through an overrunning clutch, and the hammer It executes with the striker disposed towards the anvil in the middle of its force action. 2. The device according to claim 1, characterized in that the pusher is configured to change the position of its installation along the axis of movement of the hammer. 3. The device according to claim 2, characterized in that the pusher is spring-loaded towards the anvil and is arranged to move it with a cam, on which additional stops are installed that limit the stroke of the pusher.

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