SU1368835A1 - Device for exciting seismic waves - Google Patents

Abstract

The invention relates to seismic exploration and can be used to excite seismic vibrations during seismic exploration on the surface and in underground mines. The purpose of the invention is to increase the seismic efficiency of the device. In the housing 2, a flywheel is mounted rotatably, consisting of two dish-shaped disks 9 and 10 and balls 11 placed between the disks. The body has a baffle surface 15 on which the balls produce a force effect after the accumulation of energy. The flywheel is rotated by the actuator 1, the presence of the clutch 4 allows for the subsequent excitation of oscillations automatically until the actuator 1 stops. 2 Cp. f-ly, 2 ill. (cl

Description

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The invention relates to seismic exploration and can be used to excite seismic vibrations during seismic exploration on the surface and in underground mines. The aim of the invention is to increase the seismic efficiency of the device, as well as providing mainly transverse or longitudinal waves.

FIG. 1 shows a device for exciting seismic waves while driving mainly transverse waves; figure 2 - the same, with the excitation of predominantly longitudinal waves.

The device (FIG. 1) comprises an actuator 1, a housing 2, a spring 3, a clutch coupling 4, pulleys 5 and 6, a belt 7, a shaft 8 and the flywheels placed in the housing 2 in the form of two dish-shaped disks 9 and 10 mounted coaxially with each other and the housing with external surfaces directed in opposite directions, the balls 11, the guide pipe 12, the latch, made in the form of a ball 13 and a spring 14.

The housing 2 is provided with a cylindrical fender surface 15, the axis of which is offset relative to the axis of rotation. The lower disk 9 is rigidly connected to the lower end of the shaft 8, and the upper disk 10 to the lower end of the guide tube 12. The spring 3 is mounted on the shaft 8 with the ability to interact with the upper end of the shaft 8 and the coupling 4, which is attached to the upper end of the pipe 12 with the ability to interact with the actuator 1, which is mounted on the housing 2 through the belt 7 and the tongue 6, which is mounted on the drive shaft 1, the guide tube 12 and the shaft 8 are mounted with the possibility of axial movement relative to each other in opposite directions. 11 are mounted between the disks symmetrically with each other relative to the shaft 8 with the possibility of radial movement relative to the disks 9 and 10 to return to the initial state. The latch is mounted on the guide tube 12 with the possibility of interaction with the shaft 8.

In the initial state, the balls 11 are pressed against the shaft 8 by a spring 3 through the discs 9 and 10 of the flywheel. Ball 13 is pressed

spring 14 to the shaft 8. The number of balls 11 is chosen such that in the outgoing state they touch each other. To avoid vibrating when unwinding the flywheel, shaft 8 can be placed in suspensions (not shown). The seizure of the balls 11 eliminates the disc-shaped form of the disks 9 and 10. The exclusion of repeated blows is ensured by the selection of spring stiffnesses, 3 and 14, the force of which must exceed the level of the accumulated energy of the balls 11 after they strike the bumping surface 15.

The device (Fig. 2) comprises a housing 2, consisting of two parts, provided with fender surfaces 15 and 16 in the form of two truncated cones joined together by large bases and coaxial with the axis of rotation of the shaft.

The device (figure 1) works as follows.

The device is installed on the ground with the base of the body 2, the drive I is turned on. The pulley 6 begins to rotate and through the belt 7, the pulley 5, the clutch coupling 4 and the guide tube 12 transmits the torque to the flywheel. The discs 9 and 10 and the balls 11 begin to rotate. The balls 11 under the action of centrifugal force exert pressure on the disks 9 and 10, which tends to push the latter. This is prevented by the ball 13 latch-; KI. As the number of revolutions of the actuator 1 increases, the pressure increases and reaches a value equal to the upper power threshold of the latch. The ball 13 is recessed into the guide tube 12, compressing the spring 1 4 and releasing the shaft 8, which, together with the disk 9, is lowered. The disk 10 is raised together with the guide tube 12, compressing the spring 3. The clutch 4 comes out of contact with the pulley 5. The released balls 11 move in the radial direction and produce a force effect on the fender surfaces. 15 of the housing 2, not coming out of contact with the discs 9 and 10, Lost in a significant portion of the energy upon impact, the balls 11 move in the direction of the shaft B and are set to their original position. This is facilitated by the inclined surfaces of the discs 9 and 10 and the energy of the compressed spring 3, which returns the shaft 8, the guide tube 12, the coupling

4 clutches and, respectively, the discs 9 and 10 to the initial state. The ball 13 when the shaft 8 returns to its original position also returns to its original position under the action of the spring 14. The pulley 5 again starts spinning the guide tube 12, the shaft 8 and the flywheel through the clutch 4 clutch 4, and the process repeats until Drive 1. Since the flywheel axis is offset relative to the axis of the housing 2, the balls 11 interact with the cylindrical baffle surface 15 at different times, i.e. there is a series of power effects at certain intervals of time. In this case, seismic vibrations are excited in the ground.

In the device (Fig. 2), the balls produce a force on both baffling surfaces 15 and 16. The force effect of the balls I1 is decomposed into horizontal and vertical components. The horizontal components are extinguished by the deformation of the hull, and the vertical component excites in the ground longitudinal crush seismic vibrations.

Claims (3)

1. A device for exciting seismic waves, including a housing, a rotational drive, a load in the form of at least one shch and a device for accelerating the load, characterized in that seismic efficiency, the body is equipped with a radiating plate and is made with a baffle surface, and the device for acceleration of cargo is made in the form of two dish-shaped discs installed coaxially with each other and the body; the lower disk is rigidly connected to the Vesh, placed in the guide tube, an engaging clutch mounted with the possibility of interaction with a rotational drive is attached to the lower end an upper disk is attached, the guide tube and the shaft are axially displaced relative to each other and provided with a latch and a spring installed with the possibility of interaction with the shaft and the guide tube, the load being placed between the disks. 2. The device according to claim 1, characterized in that, for the purpose of providing predominant excitation of transverse waves, the bouncing surface is cylindrical with an axis that is offset from the axis of rotation of the shaft. 3. The device according to claim 1, characterized in that, in order to provide preferential excitation of longitudinal waves, the housing consists of two parts with fender surfaces in the form of two truncated housings, articulated between themselves by large bases and coaxial with the axis of rotation of the shaft. ///////// /// /// /// /// /// /// /// .one