SU363011A1 - STAND FOR DYNAMIC AND STRENGTH TESTS CREWS - Google Patents

Description

one

The invention relates to the field of sports engineering machinery, namely, stands for the dynamic and strength tests of crews, mainly railway cars.

Known stands for dynamic and strength testing of crews, containing support rollers with variable eccentricity, rigidly mounted on the shaft connected to the drive.

However, such stands do not allow the crew to report complex vibrations with different ratios of the amplitudes and phases of the components.

The purpose of the invention is to communicate to the crew of a complex of oscillations of several components, the amplitudes and phases of each of which can vary independently of each other.

It is achieved by the fact that each roller consists of an eccentric disk with a variable eccentricity and an eccentric ring freely mounted on it, also with a variable eccentricity, which is connected to a drive that informs it of rotation, the opposite of the shaft rotation.

In a secret stand, it is advisable to make the disk and the ring composite of the outer and inner eccentrics with a number of holes around the circumference for a pin lock, and

2

To drive the ring, apply a chain drive with a reversing sprocket connecting the ring to the drive shaft of the roller. FIG. 1 shows the proposed stand; on

FIG. 2 - diagram of the drive roller; in fig. 3 (a, b, c, d, d, e) - «atiKH with a different location of the eccentric.

On the frame / installed two pairs of rollers 2, 3, which through the transfer gear 4,

drive shafts 5 and end gears 6, 7 are connected to the electric motor 8.

To change the base of the rollers, the gearbox 7 together with the rollers 3 is made movable along the guides 9 with the help of a jack 10.

Each roller consists of an eccentric disk, including an internal eccentric 11, rigidly mounted on the drive shaft 2, connected to the cardan shaft 5, and an external eccentric 13 connected to the eccentric

// with pin retainers 14, and an eccentric ring including an inner / 5 and an outer 16 eccentric, also interconnected with pin retainers 14. The eccentric ring is loosely seated on

the disk and is driven into rotation from the drive shaft 12 by means of a chain transmission, including the drive 17, the idle 18, the reversing 19, the intermediate 20, the driven 21, the tension sprocket 22 and the chain 23. So-as

the chain transmission has a reversing sprocket 19, the direction of rotation of the ring is opposite to the direction of rotation of the disk.

The eccentricity of the disk and the ring is changed by turning the composition: the eccentrics that are relative to each other. In this case, it is necessary to remove the clips 14 in advance. In changing the mutual arrangement of the eccentrics, the stand setting is concluded.

Eccentrics 11, 13 and 15, 16 may be in antiphase.

To set parallel oscillations for the crew, eccentrics are adjusted according to scheme a (see fig. 3).

In this case, the crew makes circular oscillations with an amplitude equal to e, depending on the relative position of the eccentrics 11 and 13.

When setting up the stand for galloping oscillations, i.e., for angular oscillations in the vertical plane passing through the longitudinal axis of the crew, eccentrics are arranged according to the diagram in (see Fig. 3).

In all the cases considered above, the eccentrics 15 and 16 are set to a neutral position and do not affect the character of the crew oscillations.

Diagrams d, (5 and e (see Fig. 3)) show the setup of the stand for setting the crew angular oscillations in the transverse plane. In this case, the disk and the ring should rotate in mutually opposite directions.

By shifting the eccentric // relative to the eccentric 13 and eccentric 15 relative to the eccentric 16, it is possible to change the amplitude of the crew oscillations. Using rotation in mutually opposite directions of the disk and the ring, it is possible to obtain a strictly vertical trajectory of the crew oscillations.

Thus, it is possible to create a complex of four components on the stand, and the amplitudes and phases of each of the components can be changed independently of each other.

Subject matter

Claims (4)

1.Stand for dynamic and strength testing of crews, mainly for railway cars, containing support rollers with variable eccentricity, rigidly mounted on a shaft connected to a drive, characterized in that, in order to communicate complex vibrations with different ratios of amplitudes and phases to the tested crew each roller consists of an eccentric disk with a variable eccentricity and an eccentric ring freely mounted on it, also with a variable eccentricity, which is connected to ivodom, tells him rotation, reverse rotation of the shaft. 2. A stand according to claim 1, characterized in that the disc is made of a composite of an inner and an outer eccentric, with a series of holes around the circumference for the pin retainer. 3. Stand on PP. 1, 2, characterized in that the ring is made of a composite of an inner and outer eccentric with a series of holes around the circumference for the pin retainer. 4. Stand on PP. 1-3, characterized by the use of a chain transmission with a reversing sprocket connecting the shaft with the ring. 25 17 12 / v