SU1078286A1 - Device for determination of dispersed material coefficient of friction - Google Patents

Abstract

DEVICE FOR DETERMINED -. The friction coefficient of the friction material of the dispersed material contains a base, a cylindrical counterbrake holder and a test material holder mounted on it, a material holder rotation measurement unit and a counterpiece specimen rotation drive, differing from the fact that, with an efficiency chain, it is equipped with a supporting structure and an attachment component. a coitroblast with a sector connected to the last pivot-lever pair | a 1-allogram mechanism, mounted with a frame that can be moved in the direction of the counter-specimen, Yvo, turn-a-secor, while the material holder is made in the form of an endless ribbon. Phage. one

Description

The invention relates to the testing of materials for frictional properties, in particular for determining the coefficient of friction of dispersed materials.

A device for determining the coefficient of friction of dispersed materials is known, comprising a base, a cylindrical contour sample holder and a test material holder, a material holder rotation measurement unit, and a rotation drive of the Cl7 counter sample holder;

However, the known device is characterized by insufficient efficiency in determining the coefficient of friction, which is caused by the impossibility of taking into account the influence of the interaction of particles of dispersed material moving in the flow.

The purpose of the invention is to increase the efficiency of determining the coefficient of friction of dispersed materials moving in a flow.

This goal is achieved by that a device for determining the coefficient of friction of dispersed materials, containing a base, a cylindrical contour sample holder and a test material holder mounted on it, a measurement of the rotation of the material holder and a rotational drive of the counterpiece holder, is provided with a sector co-mounted with the counter-specimen holder connected to the last hinge-parallelogram parallelogram mechanism mounted with the possibility of moving in the direction of the contra-frame by the frame, driven by the sector, while -, zhatel material is in the form of an endless belt.

Figure 1 shows a device for determining the coefficient of friction of dispersed materials; Fig. 2 is a diagram of a change in the angle of the material feed and the formation of a toggle parallelogram mechanism.

The device comprises a base 1, a holder 2 of a contra-edge 3, a holder 4 of material 5, a node 6 measuring the rotation of the holder 4, a drive 7 of rotation of the holder 2. It is equipped with a sector 8, a hinged-lever parallelogram mechanism 9, a frame 10, a drive 11 of rotating the sector 8. Holder 2. installed on the basis of

1 using the rack 12. Bunker 13. designed to accommodate the test material, the gate 14 and the beater 15 - to adjust the amount of material supplied. The node b of the measurement of rotation of the holder 4 is made in the form of an angular scale attached to sector 8. The indicator 16 mounted on the rack 12 serves to count the angle of rotation of the holder 4.

0 A hinged parallelogram mechanism 9 (figure 1) is formed by a lever 17 (figure 2) and hinges 18 connecting sector 8 to lever 17 and bracket 19. As a result, the horizontal flow of material is ensured regardless of the angle of rotation of sector 8. Holder 4 it is equipped with an autonomous drive 20. The fasteners 21 allow the frame to be moved. 10 in the direction of counterpiece 3 in order to establish the required clearance between the holder 4 and counterpiece 3.

The device works as follows.

Sector 8 is set to its original position at which the material feed angle is 5 t / 90. The hopper 13 is filled with the test material 5. Using the actuator 7, the counterpiece 3 is rotated. By moving pabttJ 10, the clearance between the holder 4 and counterpiece 3 is set to 1 1.5 mm more than the thickness of the flow of the material under study. By varying the speed of movement of the holder 4, re-aligning the beater 15 in the vertical direction and the gate 14, set the required material supply to the counterpiece 3. The actuator 11 slowly rotates the sector 8 and changes the angle of the material supply to the counterpiece 3 until the material starts to get carried away by the counterpiece 3. At this moment, with the help of the node b, the angle value is recorded. Further turning the sector 8, the angle tf is reduced to complete carry-over of the material under investigation by rotating counter-sample 3, while registering. , By the mean values of m / judged on the coefficient of friction of the test material in its moving stream.

The positive effect of the invention is due to the increased efficiency in determining the coefficient of friction of dispersed materials.

Jbr

18 Phage. 2

Claims (1)

DEVICE FOR DEFINITION-. Research Institute of Friction Coefficient of Dispersed Materials, containing a base, a cylindrical counter-sample holder mounted on it and a holder of the test material, a measurement holder rotation measuring unit, and a counter-sample holder rotation drive, characterized in that, in order to increase efficiency, it is provided coaxially with the holder counterpart sector connected; with the last articulated lever parallelogram mechanism, mounted with the possibility of movement in the direction of the counter-frame by a frame, a drive of rotation of the sector, while the material holder is made in the form of an endless belt. m QO yo yo y