SU945740A1 - Impact load force exciter - Google Patents

Description

one

The invention relates to a testing technique and is used mainly in testing products to create high-power shock loads.

A shock load exciter is known, comprising a cylinder with a nozzle and a piston with a rod mounted therein, which is connected to a table for accommodating a test article by means of a ball joint. Inside the cylinder there is a source of compressed gas, made in the form of a powder charge Cl1.

The closest to the technical essence of the invention is a shock load exciter comprising a cylinder with a piston with a seal installed in it, a source of compressed gas communicated with the working cavity of the cylinder and means for depressurizing the cylinder. The source of compressed gas is made in the form of powder pressure accumulators.

2

equipped with pressure relief valves and which can operate according to any given law.

The disadvantage of these energizers is their considerable size due to the fact that in order to comply with their reliable operation large piston sizes are required in height, which is proportional to the diameter of the piston, and piston sticking in the cylinder will naturally occur. This disadvantage makes it difficult to assemble the stand as a whole.

The purpose of the invention is to reduce the haJ5 of barites and increase the reliability of operation by eliminating the seizure of the piston.

Claims (2)

This goal is achieved by a shock load exciter comprising a cylinder with a piston with a seal installed in it, a source of compressed gas communicated with the working cavity of the cylinder, and means for depressurizing the cylinder. Equipped with an elastic sealing collar in the form of a shell of variable thickness, decreasing towards its periphery and convex in the direction opposite to the pressure source, and the cylinder is made up of two concentric rings, the outer of which has a bottom. In addition, in order to adjust the stroke of the piston in the cylinder, the rings are installed with the possibility of relative axial movement and fixation in a predetermined position, and the means for relieving pressure are made in the form of holes in the inner ring. FIG n. 1 shows a power exciter, a thinning, in fig 2, the same, plan view, fig. 3 - unit G for PHIGO 1; the exciter comprises a cylinder made of two concentric rings 1 and 2, the outer one of which (ring 1) has a bottom, the source of compressed gas connected to the cylinder, made in the form of tangentially installed powder batteries of pressure with bursting membranes 4 and pyropatrons 5, and also in the form of powder charge 6, which can be located in a cylinder, a piston 7 placed on the cylinder, equipped with an elastic sealing collar B in the form of a shell of variable thickness, decreasing to its periphery and convex in the direction opposite to the source of compressed gas - powder charge 6., and means for relieving pressure, made X in the form of a hole 9 in the inner ring 2. The collar 8 is attached to the piston 7 by means of a ring 10 with screws 1-1, and a seal between them is provided by two rubber rings 12. To create the necessary minimum clearance between the piston 7 and the bottom of the ring 1, in the bottom of the ring 1 there is a central protrusion 13 with radial channels 1. The rings 1 and 2 are installed with the possibility of relative axial movement and fixation s In position with the aid of the fastening screw 15 with left and right threads, which enters the flange 16 of ring 1 and the flange 17 of ring 2, with their ends. The exciter works as follows. The fully assembled energizer is installed in a pre-prepared socket in the test object (not ), and ignite charges depending on the mode of operation. After ignition of the powder charge 6 or the action of the powder aKKyjiyorov 3 pressure gases act on the piston 7 and simultaneously press the collar 8 to the inner ring 2 of the cylinder, which transmits force to the ring 1, including it in the joint work. Under the action of gases, the piston 7 rises and opens the opening 9 in the ring 2, the gas is released, providing the necessary pulse duration. Due to the small contact of the sealing collar 8 with the cylinder. The possibility of any jamming with distortions of the piston 7 at its relatively small strokes is practically eliminated. The adjustment of the stroke of the piston 7 is carried out using screws 15, moving the ring 2 with openings 9 relative to the ring K. Depending on the operating mode, the piston 7 can make several strokes , a large pulse power is obtained due to the fact that the piston has a large area, which is affected by powder gases with a relatively small stroke. The exciter can operate in the following modes. In the first mode, only powder accumulators of the 3 pressure ignite alternately, in the second mode all of the powder accumulators of the 3 pressure simultaneously ignite, and in the third mode, the initial impulse is generated by powder charge 6, and the subsequent alternate from powder batteries 3 pressure. The proposed Energizer makes it possible to obtain high-power shock loads with relatively small piston strokes and small dimensions of the energizer. Claim 1. A shock load actuator comprising a cylinder with a piston with a seal installed therein, a source of compressed gas communicated with the working cavity of the cylinder, and means for depressurizing the cylinder, characterized in that in order to reduce overall dimensions and increase reliability of operation by eliminating piston jamming, it is provided with an elastic sealing collar in the form of a shell of variable thickness, decreasing to its periphery and convex in the direction opposite to the pressure source, and the cylinder is made The first of two concentric rings, the outer one of which has a bottom. 2. Energizer according to claim 1, characterized in that, in order to adjust the piston stroke in the cylinder, the rings are installed with the possibility of relative axial movement and fixation in a predetermined position, and the means for releasing the pressure are made in the form of holes in the inner ring, . Sources of information taken into account in the examination 1. USSR Author's Certificate No. 255615, cl. G 01 N 3/32, 19b9. 2. USSR author's certificate number 619826, cl. G 01 N 3/32, 1973 (prototype).