RU33648U1 - The stand for vibration-shock testing of products - Google Patents

Description

Stand for vibration shock testing

The utility model relates to techniques for dynamic testing of products.

A device for testing products for vibration shock loads containing a power amplifier and a vibration exciter, a shock pulse shaper, a vibration transducer mounted on the moving part of the vibration exciter 1.

A disadvantage of the known design is the inability to create vibrational and alternating shock loads in several vibrational planes of the product.

A known design of the stand for vibration-shock testing of products, selected as a prototype, containing a platform mounted on a fixed base using elastic suspensions, designed to accommodate the test product on it, and a device for limiting the movement of the platform, made in the form of four stops, with an adjustable gap 2 .

A disadvantage of the known design is the ability to create vibration and shock loads in only one plane, while testing a certain class of products requires the application of vibration and shock loads simultaneously in several planes (for example, a gyroscope).

The purpose of the utility model is to expand the operational capabilities of the stand. This goal is achieved by the fact that to enable the adjustment of vibration and shock loads in two planes, the device is additionally equipped with at least a pair of stops installed on the free sides of the platform, and all pairs of stops are made with the possibility of longitudinal movement along the corresponding edge of the platform.

Figure 1 presents the claimed device in the context, figure 2 shows its top view.

The stand for out-of-shock testing of products includes a vibration platform 1 mounted on a fixed base using elastic suspensions 2 and 3, and designed to accommodate the test product 4, for example, a gyroscope. On the basis of the device, it was installed with the possibility of impact with the vibration platform 1 device for restricting the movement of the vibration platform 1, made in the form of stops 5 - 6, 7 - 8, 9 - 10, for example, screws installed in pairs in the vibration planes on opposite sides of the vibration platform 1 with an adjustable clearance relative to the latter, and an additional pair of stops 7-8 is placed on the free side of the vibration platform 1. The installation of the stops 5 6, 7-8,9-10 can be carried out, for example, using rigid brackets 11 into which the screws of the stops 5 - 6, 7 are screwed - 8, 9 - 10. Staples 11 Execute to move longitudinally along the respective edge Vibroplatformy 1.

The stand works as follows.

When testing on a vibration platform 1, the test product 4 is installed and vibrations of the vibration platform 1 are excited. Excitation can be carried out either by an external vibration exciter or due to the product’s own vibrational effect in the presence of unbalanced inertia forces of the rotating rotor. When testing products of rotary type, the stiffness of the elastic suspensions 2, 3 is selected from the condition of ensuring resonance at the rotational speed of the rotor of the test product. Changing the gaps between the stops 5-6, 7-8, 9-10 and the surface of the vibration platform 1, set the required values of vibration and shock loads. At the same time, the same values of the gaps between the vibration platform 1 and all the stops 5-6, 7-8, 9-10 provide a mode of translational vibrations of the tested product, and different sizes of the gaps in the pairs of stops 5-6, 9-10 and an additional pair of 7-8

additionally provide two angular components of vibration exposure on the test product. Moreover, the possibility of additional movement of the rigid brackets 11 together with the stops 5-6, 7-8, 9-10 along the corresponding edges of the vibration platform 1 provides a change in the relative position of the two planes of action of the additional angular components of the vibration on the test product. In addition, when installing gaps that increase in the sequence of stops 5 - 6, 7 - 8, 9 - 10, due to successive collisions of the vibration platform 1 with the stops, it is possible to realize a complex circumferential path of the vibration platform 1, in which tangential impacts act on the product 4.

The implementation of the device to limit the stroke of the vibration platform I in the form of at least three pairs of stops 5-6, 7-8, 9-10 with an adjustable gap installed at different edges of the vibration platform 1 with the ability to move pairs of stops along the corresponding edge of the vibration platform 1, allows you to change the values acting on test product with vibration and shock loads and set alternating impact effects in two planes, which expands the operational capabilities of the stand.

1.A.S. USSR No. 1283568. cl. G01 M 7/00

2.A.S. USSR No. 1545127. cl. G01 M 7/00

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Literature:

Vice Rector

Klimochkin Yu.N.

Claims (1)

A stand for vibration-shock testing of products, including a base mounted on a base with elastic suspensions of a vibration platform for placing the test product and mounted on the base with the possibility of impact with a vibration platform, a device made in the form of stops to limit the movement of the vibration platform, characterized in that, in order to expand operational capabilities by providing the ability to adjust vibration and shock loads in two planes, the device is additionally equipped with, at least a pair of stops mounted on the free sides of the vibration platform, all pairs of stops made with the possibility of longitudinal movement along the edge of the vibration platform.