SU1366914A1 - Arrangement for testing lump material for strength - Google Patents

Abstract

This invention relates to a technique for studying the tribological properties of lump materials. The aim of the invention is to increase the reliability of the device. On base 1, a drum 2 with a lid 3 is installed, An gz J5 Lk, e AL pivotally attached to the drum side shell. The lid 11 is fixed on the lid 3. When the drum 2 rotates, the lugs 11 interact with the bars 13 and 14. When rotated clockwise (operating mode), the lid 3 is closed. When rotating in the opposite direction, the stops 11 engage with the strips 13, ensuring the opening of the cover 3. In this case, the drum is unloaded. The lump material under study is fed through an open hatch in the drum 2 into the discharge funnel 19. The reliability of the device is improved due to the fact that the process of opening and closing the lid 3 is automated. It is provided by the interaction of the stops 11 with the strips 13 and 14. The use of a damper in the closing-opening mechanism makes it possible to eliminate the impacts of the cover 3 on the drum 2. 3 il. with S (L

Description

The invention relates to a machine building, namely to a technique for appraisal - -. ki tribological properties of lumpy materials.

The aim of the invention is to increase the reliability of the device by reducing shock loads and automating the process of opening and closing the drum cover.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. 2

The device comprises a base 1, a drum 2 with a cover 3, a hinge 4, a drum rotation drive consisting of a two-speed electric motor 5 and a gearbox 6, bearings 7 and 8, a sensor 9 of the drive operation program, a protrusion Yu located on the sidewall / drum 2 , stops 11 attached to the edge of the cover 3, spring-loaded latches consisting of axes 12, strips 13

13

and 14, springs 15 and limiter 16, feed funnel 17, inlet pipe 18, discharge funnel 19 and opening-closing mechanism consisting of body 20, stem 21, resilient element 22 and damper including piston 23 and fitting 24 with holes.

The device works as follows.

The investigated lumpy material through the feed funnel 17 through the inlet pipe 18 is fed into the drum 2. Include the electric motor 5, which through the gearbox 6 causes the rand 2 to rotate.

The device is outputted to the required test mode using the setpoint 9 of the program. The drum 2 rotates clockwise. At each revolution of the drum 2, the supports 11 contact the bar 13, which deflects up above the stop 16, and under the action of the spring 15 returns to its original position after contact between the stop 11 and the bars 13 ceases.

The lumpy material inside the drum 2 wears when it slides over the inner surface of the drum, from impacts on it and from the interaction of the pieces with each other.

At the end of the specified test time according to the signal of the setting device 9 of the program, the rotation of the drum stops

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, and to unload it again turn on the drive, ensuring the rotation of the drum 2 in the opposite direction, i.e. counterclock-wise. In this case, the lugs 11, interacting with the strips 13, open the bolt 3 on the hinge 4, and the elastic element 22 of the bolt opening-closing mechanism is compressed under Q by the action of the stem 21, kinematically connected with the lid 3 and located in the housing 20, which is hingedly attached to the end face drum 2.

With full (opening, 3 g rests on the protrusion 10. The lump material under investigation falls into the discharge funnel 19. The unloading is carried out at the speed of rotation of the drum 2, which is less than its operating speed. When unloading 2Q cover 3 occupies a position in which the stops 11 are not in contact with the slats 13, as the path of the stops 11 passes beyond the axes 12 of the slats 13 (Fig. 3). 25 When the cover 3 moves near the strips 14, the latter are deflected upwards by the action of the stops 11, and then the strips 14 are returned by the spring 15 to the initial position, i.e. to limiter 16.

After complete unloading, the drum 2 is rotated by means of a drive in the working direction (clockwise). The cover 3 closes when the lugs 11 interact with the strips 14. To ensure the hammerless closure of the cap 3, there is a damper consisting of a piston 23 and a choke 24 with holes of small diameter through which the working medium, such as air, is forced out. At this point, the test cycle is terminated.

The obtained fractions of bulk material are examined for wear, for example, by the gravimetric method. The magnitude of the mass fractions of worn material is judged on the strength of the original lump material during impact and wear.

Claims (1)

Invention Formula A device for testing lumpy materials for strength, comprising a base, a drum with a loading hatch placed on it and located on its shell and attached to it by means of a hinge with a shank, a drum rotation drive and a lid opening-closing mechanism, characterized in that In order to increase reliability, it is equipped with two stops, fixed on the edges of the lid opposite the hinge and arranged parallel to the center of the drum, and spring-loaded latches installed on the base with the possibility of their interaction with the lugs, and the opening-closing mechanism of the lid is made in the form of an elastic element with a damper. V R 7 ten R / 7 fia1