SU890303A1 - Electrodynamic vibrator - Google Patents

Description

one

The invention relates to seismic exploration and can be used to drive seismic waves.

An electrodynamic vibrator is known, comprising a magnetic core with an annular air gap, a movable system including a table and a voice coil rigidly connected with it, and other elements for hanging the voice coil in an annular air gap of the magnetic circuit 1}.

To obtain a large driving force for this vibrator, it is necessary to increase the product of the current by the number of turns, or induction. However, as the current multiplied by the number of turns of the coil increases, the gap between the core bars also increases. Due to the saturation of the steel core, it is necessary to achieve an increase in diameter and induction, which again is largely limited by the properties of the materials used. Consequently, an increase in the driving force in this way causes a significant increase in the overall dimensions of the device, its weight, and therefore makes it difficult and difficult to manufacture and repair the vibrator.

Also known electrodynamic vibrator containing a magnetic core with a bias winding installed in the air gap

10 magnetic core movable cylindrical coil whose length is greater than the length of the air zaz6ra.2.

This device has the same disadvantages.

15

The closest in technical essence to the present invention is an electromagnetic vibrator containing a magnetic core of a number of cores E-shaped and 1-shaped

Claims (3)

20 forms, a power caa-ear located in the gaps between the central cores of the cores of both forms, permanent magnets mounted on the back side of the E-shaped cores, and the base coils located around the central E-shaped core. Passing a direct current through the excitation coils or using permanent magnets in the gaps creates a magnetic flux. A alternating current is passed through the power coil, which excites the alternating electromagnetic field. The interaction of these fields leads to the number of the power coil and the base and, accordingly, the environment FsX. A disadvantage of the known vibrator is that the power roller has relatively large areas located outside the magnetic core. These areas of the coil do not create a problem when the vibrator is working, while considerable energy is dissipated in them. A fundamentally necessary additional basis for the provision of a rigid connection of all blocks leads to the relaxation of the vibrator. The complexity of the technology of fabrication and assembly, the reduction of reliability due to the large number of fasteners. The power of the vibrator is not adjustable. The aim of the invention is to increase the efficiency, ensure the change in the mosquito ness and simplify the construction by eliminating the common base. The goal is achieved by the fact that an electromagnetic vibrator containing a magnetic system with cores and coils underneath. The magnetization and moving coil are mounted from two or more modules articulated with each other and providing a continuous magnetic gap. In this case, the movable coil is formed from sections that are integral parts of the modules and commute when they are combined. You are at the edges of the cores of the modules. plump grooves and protrusions. FIG. 1 shows schematically an electrodynamic vibrator module, a general view; in fig. 2 - vibrator mounted from modules. The module consists of a core 1, on which are placed the bias reel 2. Between the cores of the core 1 are located the sections 3 of the movable coil. Grooves 4 and protrusions 5 are made on the face of the core. FIG. Figure 2 shows a vibrator consisting of four modules 6 and a moving coil 7 made up of its sections 3. The device operates as follows. The vibrator mounted from the required number of modules is installed on the ground. A constant voltage is applied to the bias coils 2, and to the moving coil 7 a control voltage. The forces of interaction between the resulting electromagnetic fields lead to mutual oscillations of the moving coil 7 and the magnetic circuit composed of cores 1, which are transmitted to the ground. The application of the proposed vibrato. This makes it possible to increase the efficiency by eliminating losses in the inactive areas of the moving section, since the magnetic gap is made without breaks, to simplify the design of the vibrators, and also to ensure the change in power by simply changing the number of modules in the assembly. 1. Electrodynamic vibrator containing a magnetic system with cores and bias coils and a moving coil, which also means that, in order to increase efficiency, ensure the change in power and simplify the design by eliminating a common base, it is assembled from two or more modules articulated with each other to provide a continuous magnetic gap, wherein the movable coil is formed from portions that are integral parts of the modules and commute when they are combined. 2. Vibrator according to claim 1, about tl and h ay and with the fact that grooves and protrusions are made on the faces of the cores of the modules. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 626833, cl. B 06 B 1/04, G 01 M 7/00, published. 1978 2. USSR author's certificate number 546386, cl. At 06 D / 04, published in 1977. .. 3. US Patent. No. 3467925, cl. And 01 F 7/08, H 01 K 51/32, published. 1969 (prototype).