Bulk material sliding friction coefficient measuring device

Abstract

The application discloses a kind of bulk sliding friction coefficient measuring devices, belongs to the field of sliding friction coefficient measurement, including base, the control electric box is arranged in one end of base, the other end of base is rotatably connected with bottom plate fixing bracket by hinge, contact bottom plate is installed in bottom plate fixing bracket, the end of bottom plate fixing bracket close to hinge is also equipped with support one, displacement detection sensor is fixedly connected on support one, electric push rod base rotating frame is slidably connected in the top of base, the end of electric push rod base rotating frame is rotatably connected with support two, electric push rod and telescopic cylinder are fixedly connected on support two, bottom plate rotating frame is also arranged in the middle of bottom end of bottom plate fixing bracket, the output shaft of electric push rod is rotatably connected with bottom plate rotating frame, the output shaft of electric push rod is also connected with displacement synchronous frame, the other end of displacement synchronous frame is fixedly connected with the telescopic shaft end of telescopic cylinder, linear displacement sensor is also arranged in the end of telescopic cylinder.The application does not need manual intervention in measurement process, without artificial error, and the measurement precision is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of sliding friction coefficient determination, and particularly relates to a bulk material sliding friction coefficient determination device. BACKGROUND

[0002] In the prior art, there are three ways to obtain the sliding friction coefficient of the material, one is literature query: directly obtaining the sliding friction coefficient of the material through books, papers and other channels; two is simulation: simulating the state of the material through discrete element simulation software (such as EDEM, PFC, etc.), comparing the difference between the simulation result in the simulation software and the real experimental result, modifying the sliding friction coefficient of the material and re-simulating, and the sliding friction coefficient is more and more accurate as the simulation result continuously approaches the real experimental result; three is manual measurement device: researchers use a simple measurement device built by existing materials, which needs to be manually driven and measured to calculate the sliding friction coefficient of the material.

[0003] However, the above three methods have their own disadvantages: literature query, although it is fast to obtain and does not need to be experimented, the material quality, measurement environment, etc. in the literature cannot be completely corresponding to the actual application environment, and there is a large difference between the value in the literature and the actual sliding friction coefficient of the material;

[0004] Simulation, although it is beneficial to control irrelevant variables, has high repeatability, and is relatively convenient to carry out without being limited by the experimental environment, but the discrete element simulation has high performance requirements for the simulation equipment, and this iterative simulation method needs a long time. Moreover, there is a certain difference between the simulation environment and the actual application environment, and some influencing factors existing in the actual application environment cannot be imported into the simulation environment, which will cause the reliability of the sliding friction coefficient obtained by simulation to decrease.

[0005] Manual measurement device, although it is convenient to manufacture and the experimental environment is relatively real, but since the operation is all manual, human error will be introduced in the driving and measurement process, which will reduce the precision of the sliding friction coefficient obtained. And repeated operation will make the researchers tired, thus causing certain safety hazards. SUMMARY

[0006] In order to overcome the shortcomings in the prior art, the purpose of the present application is to provide a bulk material sliding friction coefficient determination device, which can automatically complete the device driving, data measurement, data processing, result display and a series of processes, and does not need human intervention in the whole measurement process, so as to realize the automatic measurement of the sliding friction coefficient of the bulk material.

[0007] In order to achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application is:

[0008] The utility model provides a kind of bulk sliding friction coefficient measuring device, including base, control electric box is arranged below one end of the base, the other end of the base is rotatably connected with bottom plate fixing frame by hinge, contact bottom plate is installed in the bottom plate fixing frame, the end of the bottom plate fixing frame close to the hinge is also equipped with support one, displacement detection sensor is fixedly connected on the support one, electric push rod base rotating frame is slidably connected on the top end of the base, support two is rotatably connected on the end of the electric push rod base rotating frame, electric push rod and telescopic cylinder are fixedly connected on the support two, bottom plate rotating frame is also arranged in the middle of the bottom end of the bottom plate fixing frame, the output shaft end of the electric push rod is rotatably connected with the bottom plate rotating frame, the output shaft end of the electric push rod is also connected with displacement synchronous frame, the other end of the displacement synchronous frame is fixedly connected with the telescopic shaft end of telescopic cylinder, linear displacement sensor is also arranged on the end of the telescopic cylinder.

[0009] Preferably, the control electric box is internally provided with a power supply, a single-chip microcomputer, an electric push rod driver, a signal processor one and a signal processor two, the output end of the power supply is electrically connected with the input ends of the single-chip microcomputer, the electric push rod driver, the signal processor one and the signal processor two; the input end of the electric push rod driver is also electrically connected with the single-chip microcomputer, and the output end thereof is electrically connected with the electric push rod; the input end of the signal processor one is also electrically connected with the displacement detection sensor, and the output end thereof is electrically connected with the single-chip microcomputer; the input end of the signal processor two is also electrically connected with the linear displacement sensor, and the output end thereof is electrically connected with the single-chip microcomputer.

[0010] Preferably, the control electric box is externally provided with a start switch, a reset switch, an emergency stop switch and a digital display screen, the input end of the start switch is electrically connected with the output end of the power supply; the output ends of the reset switch and the emergency stop switch are electrically connected with the input end of the single-chip microcomputer; the input end of the digital display screen is electrically connected with the output end of the single-chip microcomputer.

[0011] Preferably, the utility model further comprises a bottom plate fixer, the contact bottom plate is detachably connected in the bottom plate fixing frame through the fixer.

[0012] The bulk sliding friction coefficient measuring device provided by the utility model has the following advantages compared with the prior art.

[0013] The application provides a bulk material sliding friction coefficient measuring device, which has few structural parts, is convenient to maintain, has small floor area, has few limitations on test site, uses displacement detection sensors to monitor material sliding, has faster response and lower error probability than manual observation, and has higher sliding friction coefficient precision; one-key operation is used to complete sliding friction measurement, manual intervention is not needed during measurement, operation errors caused by manual operation are effectively prevented, measurement precision is improved, and labor of researchers is saved; one-key reset and emergency stop button design makes device operation more convenient, and better guarantees safety of operators. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only the embodiments of the application, and for those skilled in the art, other drawings can be obtained based on the provided drawings without creative labor.

[0015] Figure 1 is an isometric view of the application;

[0016] Figure 2 is a front view of the application;

[0017] Figure 3 is a circuit principle schematic diagram of the application.

[0018] In the figure: 1-base, 2-hinge, 3-displacement detection sensor, 4-support one, 5-contact base plate, 6-base plate fixer, 7-electric push rod base rotating frame, 8-base plate rotating frame, 9-displacement synchronization frame, 10-electric push rod, 11-linear displacement sensor, 12-base plate fixed frame, 13-support two, 14-control electric box, 141-starting switch, 142-reset switch, 143-emergency stop switch, 144-digital display screen, 145-power supply, 146-single-chip microcomputer, 147-electric push rod driver, 148-signal processor one, 149-signal processor two, 15-telescopic cylinder. DETAILED DESCRIPTION

[0019] The technical solutions of the application will be further described below in combination with the drawings and embodiments:

[0020] Reference Figures 1-2As shown in the figure, the application provides a bulk material sliding friction coefficient measuring device, which comprises a base 1, a control electric box 14 arranged below one end of the base 1, a bottom plate fixing frame 12 rotatably connected to the other end of the base 1 through a hinge 2, a contact bottom plate 5 arranged in the bottom plate fixing frame 12, a support one 4 arranged at one end of the bottom plate fixing frame 12 close to the hinge 2, a displacement detection sensor 3 fixedly connected to the support one 4, an electric push rod base rotating frame 7 slidably connected to the top end of the base 1, a support two 13 rotatably connected to the end of the electric push rod base rotating frame 7, an electric push rod 10 and a telescopic cylinder 15 fixedly connected to the support two 13, a bottom plate rotating frame 8 arranged at the middle of the bottom end of the bottom plate fixing frame 12, an output shaft end of the electric push rod 10 rotatably connected to the bottom plate rotating frame 8, a displacement synchronous frame 9 connected to the output shaft end of the electric push rod 10, and a linear displacement sensor 11 fixedly connected to the other end of the displacement synchronous frame 9 and the telescopic shaft end of the telescopic cylinder 15.

[0021] Reference Figure 3 As shown in the figure, as a preferred embodiment, the control electric box 14 is internally provided with a power supply 145, a single-chip microcomputer 146, an electric push rod driver 147, a signal processor one 148 and a signal processor two 149, the output end of the power supply 145 is electrically connected to the input ends of the single-chip microcomputer 146, the electric push rod driver 147, the signal processor one 148 and the signal processor two 149, the input end of the electric push rod driver 147 is also electrically connected to the single-chip microcomputer 146, and the output end thereof is electrically connected to the electric push rod 10, the input end of the signal processor one 148 is also electrically connected to the displacement detection sensor 3, and the output end thereof is electrically connected to the single-chip microcomputer 146, the input end of the signal processor two 149 is also electrically connected to the linear displacement sensor 11, and the output end thereof is electrically connected to the single-chip microcomputer 146. Among them, the single-chip microcomputer 146, the electric push rod driver 147 and the electric push rod 10 jointly constitute a driving control part, which is responsible for tilting the contact bottom plate 5 to make it reach the critical position of material sliding. The single-chip microcomputer 146, the signal processor one 148 and the displacement detection sensor 3 constitute a material critical position detection part, which is used for detecting the critical moment of material sliding. The single-chip microcomputer 146, the signal processor two 149 and the linear displacement sensor 11 constitute an electric push rod extension length measuring part, which is used for measuring the extension length of the electric push rod 10 at the critical moment of material sliding.

[0022] As a preferred embodiment, the control box 14 is externally provided with a start switch 141, a reset switch 142, an emergency stop switch 143 and a digital display screen 144, the input end of the start switch 141 is electrically connected with the output end of the power supply 145; the output ends of the reset switch 142 and the emergency stop switch 143 are electrically connected with the input end of the single-chip microcomputer 146; the input end of the digital display screen 144 is electrically connected with the output end of the single-chip microcomputer 146. The single-chip microcomputer 146 and the digital display screen 144 constitute a data processing and display part, which is used for calculating the sliding friction coefficient of the material according to the extension length of the electric push rod 10 and displaying the result.

[0023] As a preferred embodiment, the contact base plate 5 is detachably connected in the base plate fixing frame 12 through the base plate fixer 6. The contact base plate 5 fixed by the base plate fixer 6 can be replaced according to the measurement requirements to adapt to various measurement requirements.

[0024] The working principle of the present application is as follows:

[0025] When the start switch 141 is pressed, the single-chip microcomputer 146 sends a driving signal to the electric push rod driver 147, and the electric push rod 10 starts to slowly extend, and the contact base plate 5 starts to rotate in the counterclockwise direction along the hinge 2 under the extension of the electric push rod 10 from the initial position horizontally with the ground.

[0026] When the inclination of the contact base plate 5 makes the material start to slide, the displacement detection sensor 3 sends the signal of the material sliding to the single-chip microcomputer 146 through the signal processor 148, and then the single-chip microcomputer 146 sends a stop signal to the electric push rod driver 147, and the electric push rod 10 stops extending. At the same time, the single-chip microcomputer 146 obtains the extension length of the electric push rod 10 at this moment through the linear displacement sensor 11, and calculates the included angle between the contact base plate 5 and the horizontal plane at the critical position of the material sliding, so as to calculate the sliding friction coefficient of the material, and display the calculation result through the digital display screen 144, thereby achieving the intended purpose.

[0027] After the recording of the calculation result is completed, the reset switch 142 can be pressed, at this time the single-chip microcomputer 146 sends a reverse driving signal to the electric push rod driver 147, and the electric push rod 10 slowly retracts until the contact base plate 5 is horizontal with the ground, so as to facilitate the subsequent repeated test.

[0028] For safety considerations, the device is also provided with an emergency stop switch 143, which will stop all movements of the device when pressed.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0031] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A bulk material sliding friction coefficient measuring device, characterized by, The utility model provides a contact bottom plate and material displacement detection device, including base (1), the control electric box (14) is provided with below one end of base (1), the bottom plate fixed frame (12) is rotatably connected through the hinge (2) at the other end of base (1), the contact bottom plate (5) is installed in the bottom plate fixed frame (12), the one end of bottom plate fixed frame (12) is close to the hinge (2) still be equipped with support no. The control electric box (14) is equipped with power (145), singlechip (146), electric push rod driver (147), signal processor no. The control electric box (14) is equipped with start switch (141), reset switch (142), emergency stop switch (143) and digital display screen (144) outside, the input of start switch (141) is connected with the output of power (145) electricity;Reset switch (142), emergency stop switch (143) output and singlechip (146) input electricity are connected;The input of digital display screen (144) and singlechip (146) output electricity are connected; When the inclination degree of contact bottom plate (5) makes material begin to slide, displacement detection sensor (3) sends the signal of material sliding to singlechip (146) through signal processor no.

2. A bulk material sliding friction coefficient measuring apparatus according to claim 1, wherein Further include: A bottom plate holder (6) by which the contact bottom plate (5) is detachably connected in the bottom plate holder (12).

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