CN-122016637-A - Device for measuring friction force of granular body

CN122016637ACN 122016637 ACN122016637 ACN 122016637ACN-122016637-A

Abstract

The invention relates to a particulate friction measuring device. The device comprises a base, an accommodating cylinder, an experimental arm, an extruding mechanism, a rotating mechanism, a speed reducing motor, a friction disc, a rotation stopping matching structure and a friction disc, wherein the accommodating cylinder is detachably arranged on the base, the axis of the accommodating cylinder is vertically arranged, the lower end of the experimental arm is fixed on the base, the horizontal section of the upper end extends to the upper side of the accommodating cylinder, an installation hole with the axis vertically arranged is formed in the horizontal section, the extruding mechanism is arranged on the horizontal section and comprises a telescopic rod, the telescopic rod coaxially penetrates through the installation hole and downwardly extends, the lower end of the telescopic rod is provided with an installation sleeve with an opening at the lower end, the rotating mechanism comprises a speed reducing motor, the speed reducing motor is arranged in the opening at the lower end of the installation sleeve, an output shaft of the speed reducing motor downwardly extends and is connected with a torque sensor, the lower end of the torque sensor is connected with a first connector, the friction disc is located right above the accommodating cylinder and comprises a disc body, a friction layer is arranged at the lower part of the disc body, a second connector is arranged in the center of the upper part of the disc body, and a rotation stopping matching structure in mutual plug-in fit is arranged between the first connector and the second connector.

Inventors

ZHANG ZIQING
BAI CHUNQI
WANG QIRUI
WANG SEN
ZHAO HAO
WANG XIAOXUAN

Assignees

河南工业大学

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (10)

1. The particulate friction measuring device is characterized by comprising: A base; The accommodating cylinder is used for accommodating the to-be-detected granular bodies and is detachably arranged on the base, and the axis of the accommodating cylinder is vertically arranged; The experimental arm is L-shaped, the lower end of the experimental arm is fixed on the base, the horizontal section of the upper end of the experimental arm extends to the upper part of the accommodating cylinder, and the horizontal section is provided with a mounting hole with a vertically arranged axis; The extrusion mechanism is arranged on the horizontal section and comprises a telescopic rod, the telescopic rod coaxially penetrates through the mounting hole to extend downwards, and the lower end of the telescopic rod is provided with a mounting sleeve with an opening at the lower end; The rotating mechanism comprises a gear motor, the gear motor is arranged in an opening at the lower end of the mounting sleeve, an output shaft of the gear motor extends downwards and is connected with a torque sensor, and the lower end of the torque sensor is connected with a first connecting head; The friction disc is located right above the containing cylinder and comprises a disc body, a friction layer is arranged at the lower portion of the disc body, a second connector is arranged at the center of the upper portion of the disc body, and a rotation stopping matching structure which is mutually inserted and matched is arranged between the first connector and the second connector.
2. The particulate friction measuring apparatus according to claim 1 wherein the rotation-stopping mating structure comprises a projection and a recess in a non-revolving body shape.
3. A particulate friction measuring apparatus according to claim 2, wherein the first connector and/or the second connector are/is provided with permanent magnet portions so as to be attracted to each other by magnetic force.
4. A bulk friction measuring device according to claim 3, wherein the first connector comprises a mounting plate and the boss in the middle of the mounting plate, and the permanent magnet portions are uniformly distributed on the lower surface of the mounting plate.
5. The particulate friction measuring apparatus according to claim 1, wherein the friction layer is formed by binding particulate bodies by colloid.
6. The particulate matter friction measuring apparatus according to claim 5, wherein the particulate matter used for the friction layer and the particulate matter to be measured in the accommodation barrel are different types or the same types of particulate matter.
7. A bulk friction measuring device according to claim 1, wherein the friction layer is corrugated steel plate or concrete plate or polypropylene plate.
8. The friction measuring device for granular bodies according to claim 1, wherein the base is provided with a round table, the outer diameter of the round table is identical to the inner diameter of the accommodating cylinder, the accommodating cylinder is of a circular tubular structure with two ends penetrating, the sleeved part of the accommodating cylinder and the round table is provided with a threaded hole which is correspondingly arranged, and the two parts are detachably connected through a fastening bolt.
9. The particulate matter friction measuring apparatus according to claim 1, wherein the telescopic rod of the pressing mechanism is connected in series with a pressure sensor.
10. The particulate friction measuring apparatus according to claim 1, wherein the cross section of the projection and the groove is cross-shaped.

Description

Device for measuring friction force of granular body Technical Field The invention relates to a particulate friction measuring device. Background The measurement of the friction force (intra-particle friction) between the particles and the friction force (wall friction) between the particles and the container is a core basic work of dispersion mechanics, and the significance of the measurement is that the measurement is penetrated in a plurality of fields such as engineering design, production process optimization, equipment research and development, safety prevention and control and the like, and the feasibility, economy and safety of related technical schemes are directly determined. Taking grains as an example, in order to realize the discrete element simulation analysis of wheat seed grains, the static friction coefficient and the dynamic friction coefficient between wheat are needed to be known, and in order to design some grains conveying related equipment, such as a conveyor, a vibrating screen and the like, the friction coefficient between grains and the surface of the equipment is also needed to be known. Disclosure of Invention The invention provides a device for measuring friction force of particles, which can measure friction force and friction coefficient between different types of particles, and can measure friction force and friction coefficient between particles and a contact material. The invention has the technical scheme that the device for measuring the friction force of the granular body comprises: A base; The accommodating cylinder is used for accommodating the to-be-detected granular bodies and is detachably arranged on the base, and the axis of the accommodating cylinder is vertically arranged; The experimental arm is L-shaped, the lower end of the experimental arm is fixed on the base, the horizontal section of the upper end of the experimental arm extends to the upper part of the accommodating cylinder, and the horizontal section is provided with a mounting hole with a vertically arranged axis; The extrusion mechanism is arranged on the horizontal section and comprises a telescopic rod, the telescopic rod coaxially penetrates through the mounting hole to extend downwards, and the lower end of the telescopic rod is provided with a mounting sleeve with an opening at the lower end; The rotating mechanism comprises a gear motor, the gear motor is arranged in an opening at the lower end of the mounting sleeve, an output shaft of the gear motor extends downwards and is connected with a torque sensor, and the lower end of the torque sensor is connected with a first connecting head; The friction disc is located right above the containing cylinder and comprises a disc body, a friction layer is arranged at the lower portion of the disc body, a second connector is arranged at the center of the upper portion of the disc body, and a rotation stopping matching structure which is mutually inserted and matched is arranged between the first connector and the second connector. Based on the scheme, the anti-rotation matching structure is further improved as follows, and comprises a convex column and a concave groove which are not in a revolving body shape. Based on the scheme, the improvement is that the first connector and/or the second connector are/is provided with permanent magnet parts so that the permanent magnet parts are attracted to each other by means of magnetic force. On the basis of the scheme, the permanent magnet part is further improved in that the first connector comprises a mounting disc and the convex columns positioned in the middle of the mounting disc, and the permanent magnet part is uniformly distributed on the lower surface of the mounting disc. Based on the scheme, the friction layer is formed by bonding particulate bodies through colloid. On the basis of the scheme, the friction layer is further improved in the way that the granular bodies used by the friction layer and the granular bodies to be measured in the accommodating cylinder are different types or the same types of granular bodies. On the basis of the scheme, the friction layer is a corrugated steel plate or a concrete plate or a polypropylene plate. On the basis of the scheme, the base is further improved in that the base is provided with the round table, the outer diameter of the round table is identical with the inner diameter of the accommodating cylinder, the accommodating cylinder is of a circular tube-shaped structure with two ends penetrating, the sleeved part of the accommodating cylinder and the round table is provided with the corresponding threaded holes, and the detachable connection of the accommodating cylinder and the round table is realized through the fastening bolts. Based on the scheme, the pressure sensor is further improved as follows, and the telescopic rod of the extrusion mechanism is connected in series. Based on the scheme, the cross sections of the convex columns and the grooves are cros