阅读说明：本技术 一种材料表面润湿性接触角及滚动角的测量装置 (Measuring device for wettability contact angle and rolling angle of material surface ) 是由 杨志儒 周阳 何自勇 吴万里 乐德正 于 2020-05-11 设计创作，主要内容包括：本发明提供了一种材料表面润湿性接触角及滚动角的测量装置,包括滴液装置、可倾斜工作台装置、滚轮滑块、高速相机、光源、底座和圆盘底座；所述圆盘底座边缘设有环形导轨槽,所述高速相机通过一个滚轮滑块安装在环形导轨槽上,所述光源通过另一滚轮滑块安装在环形导轨槽上；所述圆盘底座中心设有底座,所述底座上安装滴液装置,所述滴液装置用于产生滴液；所述可倾斜工作台装置与底座滑动副连接,所述可倾斜工作台装置上设有待测试表面,所述可倾斜工作台装置用于使待测试表面产生倾斜。本发明可通过滚珠丝杠机构与剪式升降机构的组合使用,通过齿轮齿条的啮合,可精确控制工作台的倾斜角度,有利于精确定位。(The invention provides a device for measuring a contact angle and a rolling angle of wettability of a material surface, which comprises a liquid dropping device, an inclinable workbench device, a roller slider, a high-speed camera, a light source, a base and a disc base, wherein the liquid dropping device is arranged on the base; the edge of the disc base is provided with an annular guide rail groove, the high-speed camera is arranged on the annular guide rail groove through one roller sliding block, and the light source is arranged on the annular guide rail groove through the other roller sliding block; a base is arranged in the center of the disc base, and a liquid dropping device is arranged on the base and used for generating liquid dropping; the tiltable workbench device is connected with the base sliding pair, a surface to be tested is arranged on the tiltable workbench device, and the tiltable workbench device is used for tilting the surface to be tested. The invention can be used by combining the ball screw mechanism and the shear type lifting mechanism, and can accurately control the inclination angle of the workbench through the meshing of the gear and the rack, thereby being beneficial to accurate positioning.)

1. A measuring device for a wetting contact angle and a rolling angle of a material surface is characterized by comprising a liquid dropping device (1), an inclinable workbench device (2), a roller slider (3), a high-speed camera (4), a light source (5), a base (6) and a disc base (7); the edge of the disc base (7) is provided with an annular guide rail groove (71), the high-speed camera (4) is installed on the annular guide rail groove (71) through one roller sliding block (3), and the light source (5) is installed on the annular guide rail groove (71) through the other roller sliding block (3); a base (6) is arranged in the center of the disc base (7), a liquid dropping device (1) is installed on the base (6), and the liquid dropping device (1) is used for generating liquid dropping; the tiltable table device (2) is connected with the base (6) in a sliding pair manner, the tiltable table device (2) is provided with a surface to be tested, and the tiltable table device (2) is used for tilting the surface to be tested.

2. The device for measuring the wettability contact angle and the rolling angle of the surface of the material according to claim 1, wherein the dripping device (1) comprises a bracket (11), a lifting adjuster (12), a liquid drop injector (13), a clamp (14), a chute (15) and a slide rail (16); the support (11) is mounted on the base (6), a sliding groove (15) is formed in the support (11), the lifting regulator (12) is mounted on the support (11), and the lifting regulator (12) moves along the sliding groove (15); one end of the liquid drop sample injector (13) is installed on the lifting regulator (12), the other end of the liquid drop sample injector (13) is fixed through a clamp (14), and the clamp (14) is fixed on the support (11) through a sliding rail (16).

3. The device for measuring the wettability contact angle and the rolling angle of the surface of a material according to claim 1, wherein the tiltable table device (2) comprises a vertical screw lifting device (21), a bottom plate (22), a table base (23), a horizontal ball screw device (24), a scissor lifting device (25), a gear (26), a rack (27), a table (28) and a supporting base (29); the bottom plate (22) comprises a tiltable workbench device base (221) and a vertical screw rod lifting device lifting platform (222), and the tiltable workbench device base (221) is arranged in a second sliding chute (62) in the base (6) in a sliding pair mode; the vertical lead screw lifting device (21) is arranged on a base (221) of the tiltable workbench device, a workbench base (23) is arranged on the lifting platform (222) of the vertical screw rod lifting device, a horizontal ball screw device (24) is arranged on the workbench base (23), a shear type lifting device (25) is arranged on a slide block of the horizontal ball screw device (24), the top of the shear type lifting device (25) is provided with a rotatable gear (26), one end of the workbench (28) is connected with a rotating pair at one end of a supporting seat (29), the other end of the supporting seat (29) is arranged on a workbench base (23), a rack (27) is arranged on the bottom surface of the workbench (28) in the horizontal direction, the rack (27) is meshed with the gear (26), the worktable (28) is inclined through the horizontal movement of the slide block of the horizontal ball screw device (24); the top surface of the workbench (28) is a surface to be tested.

4. The device for measuring the wettability contact angle and the rolling angle of the surface of the material according to claim 1, wherein the roller slider (3) comprises a motor (31), an upper roller (32), a side roller (33) and a lower roller (34); the utility model discloses a disc base, including disc base, top gyro wheel (32), side gyro wheel (31), top gyro wheel (32) and below gyro wheel (34) are connected with the transmission of top gyro wheel (32) or side gyro wheel (33) respectively with the contact of annular guide rail groove (71) upper and lower face rolling pair, side gyro wheel (33) and disc base (7) excircle rolling pair contact, motor (31), top gyro wheel (32), side gyro wheel (33) and below gyro wheel (34) are all installed on the support frame, motor (31) are connected through transmission and top gyro wheel (32) or side gyro wheel (33) transmission.

5. The device for measuring the wettability contact angle and the rolling angle of the surface of a material according to claim 1, wherein the high-speed camera (4) and the light source (5) are arranged at 180 degrees, and one roller slide block (3) provided with the high-speed camera (4) and the other roller slide block (3) provided with the light source (5) are arranged to rotate synchronously through a control component.

6. The device for measuring the wettability contact angle and the rolling angle of the material surface according to claim 5, wherein the high-speed camera (4) makes a circular motion along the disc base (7), a plurality of groups of images are acquired in 360 degrees in all directions, and a three-dimensional image of the liquid drop is fitted by a computer.

Technical Field

The invention relates to the technical field of material surface wettability measurement, in particular to a device for measuring a material surface wettability contact angle and a rolling angle.

Background

The contact angle of a liquid on the surface of a solid material is an important parameter for measuring the wettability of the liquid on the surface of the material. The larger the contact angle is, the stronger the hydrophobicity of the surface of the material is, and conversely, the stronger the hydrophilicity of the surface of the material is. The roll-off angle, which is a critical angle at which a drop of a certain mass starts to roll on an inclined surface, can be used as another index for evaluating the wettability of the surface of a material. The smaller the rolling angle is, the stronger the hydrophobicity of the surface of the material is, and the stronger the hydrophilicity of the surface of the material is.

Currently, the most widespread and direct method for contact angle measurement is topographical image analysis. The principle is that liquid drops are dripped on the surface of a solid sample, the outline image of the liquid drops is obtained through a microscope and a camera, the projection outline of the liquid drops is processed by using the image, and the contact angle is calculated. However, due to the uneven surface structure and chemical composition of the material, the measured contact angles in different directions are often inconsistent or even greatly different. If such measurement errors are reduced, it is helpful to accurately reflect the wettability effect of the measurement surface.

The roll angle measurement needs to be carried out on a tiltable workbench, and the devices generally adopt a ball screw to control the inclination angle of the workbench for recording roll angle data in real time. However, all have certain limitations, which are as follows:

in the existing Chinese invention patent, the vertical support in the device has a certain length, so that the workbench has a certain initial inclination angle, and when the rolling angle is within the range from 0 to the initial inclination angle, the measurement cannot be carried out, so that the device has certain limitation.

In the prior Chinese invention patent, a ball screw mechanism in the device is fixed on an inclined bottom plate and forms a certain included angle with the horizontal direction. The initial angle of the workbench is 0, but the ball screw mechanism forms a certain included angle with the horizontal direction, so that the maximum inclination angle of the workbench is smaller than 90 degrees, and the rolling angle can not be measured within the range from the maximum inclination angle to 90 degrees, and the workbench has certain limitation.

The contact mode of the sliding block or the supporting frame in the ball screw mechanism and the tiltable working table is direct contact or rolling contact, and the defect that the precise positioning is not facilitated, so that the inclination angle of the working table cannot be precisely controlled.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a device for measuring the wettability contact angle and the rolling angle of the surface of a material, which can acquire multiple groups of images in all directions by a high-speed camera at 360 degrees, further fit a three-dimensional image of a liquid drop by a computer and reduce the error of a two-dimensional image shot in a single direction; the inclination angle of the inclined workbench is 0-90 degrees by the combined use of the ball screw mechanism and the scissor type lifting mechanism, and the rolling angle measuring range is 0-90 degrees; through the meshing of the gear and the rack, the inclination angle of the workbench can be accurately controlled, and the precise positioning is facilitated.

The present invention achieves the above-described object by the following technical means.

A measuring device for a contact angle and a rolling angle of wettability of a material surface comprises a liquid dropping device, a tiltable workbench device, a roller slider, a high-speed camera, a light source, a base and a disc base; the edge of the disc base is provided with an annular guide rail groove, the high-speed camera is arranged on the annular guide rail groove through one roller sliding block, and the light source is arranged on the annular guide rail groove through the other roller sliding block; a base is arranged in the center of the disc base, and a liquid dropping device is arranged on the base and used for generating liquid dropping; the tiltable workbench device is connected with the base sliding pair, a surface to be tested is arranged on the tiltable workbench device, and the tiltable workbench device is used for tilting the surface to be tested.

Further, the liquid dropping device comprises a bracket, a lifting regulator, a liquid drop sample injector, a clamp, a chute and a slide rail; the bracket is mounted on the base, a sliding groove is formed in the bracket, the lifting adjuster is mounted on the bracket, and the lifting adjuster moves along the sliding groove; one end of the liquid drop sample injector is installed on the lifting regulator, the other end of the liquid drop sample injector is fixed through a clamp, and the clamp is fixed on the support through a sliding rail.

Further, the tiltable working table device comprises a vertical screw rod lifting device, a bottom plate, a working table base, a horizontal ball screw rod device, a scissor type lifting device, a gear, a rack, a working table and a supporting seat; the bottom plate comprises a tiltable workbench device base and a vertical screw rod lifting device lifting platform, and the tiltable workbench device base is arranged in a second sliding chute in the base in a sliding pair mode; the vertical screw rod lifting device is arranged on a base of the tiltable workbench device, the workbench base is arranged on a lifting platform of the vertical screw rod lifting device, the horizontal ball screw rod device is arranged on the workbench base, the shear type lifting device is arranged on a sliding block of the horizontal ball screw rod device, a rotatable gear is arranged at the top of the shear type lifting device, one end of the workbench is connected with a rotating pair at one end of a supporting seat, the other end of the supporting seat is arranged on the workbench base, a rack is arranged on the bottom surface of the workbench in the horizontal direction, the rack is meshed with the gear, and the workbench tilts through the horizontal movement of the sliding block of the horizontal ball screw rod device; the top surface of the workbench is a surface to be tested.

Further, the roller sliding block comprises a motor, an upper roller, a side roller and a lower roller; the upper roller and the lower roller are respectively in contact with the upper surface rolling pair and the lower surface rolling pair of the annular guide rail groove, the lateral rollers are in contact with the outer circle rolling pair of the disc base, the motor, the upper roller, the lateral rollers and the lower rollers are all installed on the supporting frame, and the motor is in transmission connection with the upper roller or the lateral rollers through a transmission device.

Further, the high-speed camera and the light source are placed at an angle of 180 degrees, and one roller slider for mounting the high-speed camera and the other roller slider for mounting the light source are installed to realize synchronous rotation through a control part.

Furthermore, the high-speed camera makes circular motion along the disc base, a plurality of groups of images are acquired in all directions by 360 degrees, and a three-dimensional image of the liquid drop is fitted by a computer.

The invention has the beneficial effects that:

1. the measuring device for the wettability contact angle and the rolling angle of the surface of the material can acquire multiple groups of images in all directions through a high-speed camera by 360 degrees, and then fit a three-dimensional image of liquid drops through a computer, so that the error of a two-dimensional image shot in a single direction can be reduced, and the measuring result is more accurate.

2. The device for measuring the wettability contact angle and the rolling angle of the surface of the material can make the inclination angle of the inclined workbench be 0-90 degrees and the rolling angle measurement range be 0-90 degrees by using the combination of the ball screw mechanism and the shear type lifting mechanism.

3. The measuring device for the wettability contact angle and the rolling angle of the surface of the material can accurately control the inclination angle of the workbench through the meshing of the gear and the rack, and is favorable for accurate positioning.

Drawings

FIG. 1 is a front perspective view of the integral assembly of the present invention.

Fig. 2 is a side perspective view of the integral assembly of the present invention.

Fig. 3 is a partial perspective isometric view of the integral assembly of the present invention.

Fig. 4 is another partial perspective isometric view of the integral assembly of the present invention.

FIG. 5 is a front perspective view of the tiltable table of the present invention.

In the figure:

1-a dropping device; 2-tiltable table means; 3-roller sliding block; 4-a high-speed camera; 5-a light source; 6-a base; 7-a disc base; 11-a scaffold; 12-a lift adjuster; 13-a droplet injector; 14-a clamp; 15-a chute; 16-a slide rail; 21-a vertical lead screw lifting device; 22-a base plate; 221-tiltable table apparatus base; 222-vertical screw lifting device lifting table; 23-a table base; 231-a chute; 24-a horizontal ball screw device; 241-hand wheel; 242-a support; 243-slide block; 25-scissor lift; 26-a gear; 27-a rack; 28-a workbench; 29-a support seat; 291-hole; 31-a motor; 32-upper rollers; 33-side rollers; 34-lower rollers; 41-camera support; 51-a light source holder; 61-a first runner; 62-a second chute; 71-an annular guide rail groove; 72-support of the disc base.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in FIG. 1, the device for measuring the wettability contact angle and the rolling angle of the material surface comprises a liquid dropping device 1, a tiltable table device 2, a roller slider 3, a high-speed camera 4, a light source 5, a base 6 and a disk base 7; the edge of the disc base 7 is provided with an annular guide rail groove 71, the high-speed camera 4 is installed on the annular guide rail groove 71 through one roller slide block 3, and the light source 5 is installed on the annular guide rail groove 71 through the other roller slide block 3; a base 6 is arranged in the center of the disc base 7, a liquid dropping device 1 is mounted on the base 6, and the liquid dropping device 1 is used for generating liquid dropping; the tiltable table device 2 is connected with a base 6 in a sliding pair mode, a surface to be tested is arranged on the tiltable table device 2, and the tiltable table device 2 is used for enabling the surface to be tested to incline. The bottom of the disc base 7 is provided with a disc base supporting frame 72.

As shown in fig. 2, the dropping device 1 includes a holder 11, a lifting regulator 12, a droplet injector 13, a jig 14, a chute 15, and a slide rail 16; the bracket 11 is arranged in a first sliding groove 61 on the base 6, and the bracket 11 can move along the sliding groove; a sliding groove 15 is formed in the support 11, the lifting adjuster 12 is mounted on the support 11, and the lifting adjuster 12 moves along the sliding groove 15; one end of the liquid drop injector 13 is arranged on the lifting regulator 12, the other end of the liquid drop injector 13 is fixed by a clamp 14, and the clamp 14 is fixed on the bracket 11 by a slide rail 16.

As shown in fig. 5, the tiltable table apparatus 2 includes a vertical screw lifting device 21, a bottom plate 22, a table base 23, a horizontal ball screw device 24, a scissor lifting device 25, a gear 26, a rack 27, a table 28, and a support base 29; the bottom plate 22 comprises a tiltable table device base 221 and a vertical lead screw lifting device lifting platform 222, the tiltable table device base 221 is arranged in a second chute 62 in the base 6 in a sliding pair mode; the vertical screw lifting device 21 is mounted on a tiltable table device base 221, the vertical screw lifting device lifting platform 222 is mounted with a table base 23, the table base 23 is mounted with a horizontal ball screw device 24, and the horizontal ball screw device 24 comprises a hand wheel 241, a support 242 and a slide 243; a sliding groove 231 is formed in the workbench base 23, the sliding block 243 can move along the sliding groove 231, the hand wheel 241 is connected with the horizontal ball screw, and the sliding block 243 moves horizontally by rotating the hand wheel 241. Determining the rotation number of the hand wheel and the inclination angle of the workbench through a conversion relation, and engraving scales on the hand wheel; or the inclination angle between the meshing position of the gear and the rack and the workbench is determined through conversion relation, and the scales can be arranged on the side surface of the workbench. A support 242 is arranged on the sliding block 243, a scissor type lifting device 25 is arranged on the support 242, a rotatable gear 26 is arranged at the top of the scissor type lifting device 25, one end of the workbench 28 is connected with a rotating pair at one end of a support seat 29, the other end of the support seat 29 is arranged on a workbench base 23, a rack 27 is arranged on the bottom surface of the workbench 28 in the horizontal direction, the rack 27 is meshed with the gear 26, and the workbench 28 is inclined through the horizontal movement of the sliding block of a horizontal ball screw device 24; the top surface of the table 28 is the surface to be tested. The support seat 29 is provided with a hole 291, and a bearing and a shaft are arranged in the hole 291 for forming a rotating pair. The workbench 28 can rotate accurately within the range of 0-30 degrees by adjusting the scissor type lifting device 25, the workbench 28 can rotate accurately within the range of 30-90 degrees by the horizontal ball screw device 24, and the scissor type lifting device 25 and the horizontal ball screw device 24 are combined together for use, so that the measuring range of the scissor type lifting device is 0-90 degrees.

As shown in fig. 3 and 4, the roller slider 3 includes a motor 31, an upper roller 32, a side roller 33, and a lower roller 34; the upper roller 32 and the lower roller 34 are in contact with upper and lower surface rolling pairs of the annular guide rail groove 71 respectively, the lateral roller 33 is in contact with an excircle rolling pair of the disc base 7, the motor 31, the upper roller 32, the lateral roller 33 and the lower roller 34 are all installed on the supporting frame, and the motor 31 is in transmission connection with the upper roller 32 or the lateral roller 33 through a transmission device.

The high-speed camera 4 and the light source 5 are arranged at an angle of 180 degrees, the high-speed camera 4 is mounted on one roller slide block 3 through a camera support 41, and the light source 5 is mounted on the other roller slide block 3 through a light source support 51. One roller slide block 3 for mounting the high-speed camera 4 and the other roller slide block 3 for mounting the light source 5 realize synchronous rotation through a control part.

The high-speed camera 4 does circular motion along the disc base 7, collects multiple groups of images in all directions by 360 degrees, fits a three-dimensional image of liquid drops by a computer, and can reduce errors of two-dimensional images shot in one direction and enable measurement results to be more accurate.