Rotational rheometer parallel plate clamp based on acoustic emission sensor

Abstract

The utility model relates to the technical field of rotational rheometers, in particular to a rotational rheometer parallel plate clamp based on an acoustic emission sensor. The clamp comprises a fixed part, a rotating part and an acoustic emission sensor, the fixing piece is used for loading a to-be-tested material and comprises a connecting seat connected with the rotational rheometer and a sample disc arranged at the top end of the connecting seat; the rotating piece is located above the sample disc, can move in the vertical direction and is used for being matched with the sample disc to fix a to-be-tested material to a corresponding position on the sample disc; the rotating piece can also rotate by taking the moving direction as a rotating shaft and is used for driving the to-be-tested material to rotate at a corresponding rotating speed; the acoustic emission sensor is arranged on the sample disc and used for collecting transient elastic waves generated by the to-be-tested material when the to-be-tested material rotates. According to the rotational rheometer, transient elastic waves generated during rotation of the to-be-detected material can be collected while the rheological property of the to-be-detected material is detected, so that the result of performance analysis of the to-be-detected material by the rotational rheometer is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotating rheometer technical field especially relates to a rotating rheometer parallel plate fixture based on acoustic emission sensor. BACKGROUND

[0002] When studying the rheological characteristics of materials, the rotating rheometer is usually used to detect the sample of the material by applying forced steady rate load, steady stress load, dynamic sinusoidal periodic strain load or dynamic sinusoidal periodic stress load, the material is clamped by the parallel plate fixture during detection, and the relative movement between the parallel plate fixtures makes the material produce shear deformation, so that various liquid viscosity and other flow parameters and storage modulus, loss modulus and other viscoelastic parameters are measured.

[0003] The existing rotating rheometer is only limited to measuring the rheological characteristics of the material itself when detecting the material, but the material also produces weak stress waves, such as transient elastic waves, when it is in a shear deformation state, and these weak stress waves can often represent the actual working characteristics of the material, but the existing rotating rheometer cannot accurately measure the weak stress waves produced by the material. SUMMARY

[0004] Therefore, the utility model provides a rotating rheometer parallel plate fixture based on acoustic emission sensor to overcome the problem that the existing rotating rheometer can only detect the rheological characteristics of the material itself when studying the characteristics of the material and cannot detect the transient elastic waves produced by the material when it is rotating.

[0005] To achieve the above purpose, the utility model provides a rotating rheometer parallel plate fixture based on acoustic emission sensor, which comprises:

[0006] The fixing member is used to load the material to be detected, and comprises a connecting seat connected with the rotating rheometer and a sample disc arranged at the top end of the connecting seat;

[0007] The rotating member is located above the sample disc and can move in the vertical direction to fix the material to be detected at the corresponding position on the sample disc in cooperation with the sample disc, and the rotating member can also rotate around the moving direction as the rotation axis to drive the material to be detected to rotate at a corresponding rotation speed;

[0008] The acoustic emission sensor is arranged on the sample disc to collect the transient elastic waves produced by the material to be detected when the material to be detected rotates.

[0009] Further, the sample disc comprises:

[0010] The bottom plate is connected with the connecting seat to load the material to be detected;

[0011] A side wall is arranged at the edge of the bottom plate to mount the acoustic emission sensor.

[0012] Further, the bottom plate and the side wall are integrally formed.

[0013] Further, the side wall is provided with at least one plane perpendicular to the surface of the bottom plate to mount the acoustic emission sensor.

[0014] Further, the sample disc is provided with at least one observation port to observe the state of the material to be tested, and each observation port penetrates the side wall.

[0015] Further, the side wall has magnetism.

[0016] Further, the acoustic emission sensor is provided with a ferromagnetic material near one side of the side wall to be fixed at the corresponding position of the plane by magnetic force.

[0017] Further, the rotating member is provided with a conical rotating head at one end thereof facing the sample disc, and the tip of the rotating head is close to the sample disc.

[0018] Further, the rotational rheometer further comprises a preamplifier connected to the acoustic emission sensor to amplify the transient elastic wave signal collected by the acoustic emission sensor.

[0019] Further, the fixing member and the rotating member are made of high-strength alloy steel.

[0020] Compared with the prior art, the parallel plate clamp of the rotational rheometer based on the acoustic emission sensor has the beneficial effects that the fixing member connects the sample disc to the rotational rheometer through the connecting seat, the material to be tested is clamped between the rotating member and the sample disc through the cooperation of the rotating member and the sample disc, and the material to be tested is rotated to detect the rheological properties of the material to be tested through the rotation of the rotating member; the material to be tested generates transient elastic waves when rotating, the acoustic emission sensor arranged on the sample disc is used to collect the transient elastic waves generated when the material to be tested rotates, so that the rotational rheometer can collect the transient elastic waves generated when the material to be tested rotates while detecting the rheological properties of the material to be tested, thereby making the performance analysis result of the material to be tested by the rotational rheometer more accurate.

[0021] Further, the sample disc of the utility model comprises a bottom plate and a side wall, the bottom plate provides a plane to load the material to be tested to rotate the material to be tested in cooperation with the rotating member, and the side wall surrounds the edge of the bottom plate to mount the acoustic emission sensor to collect the transient elastic waves and prevent the material to be tested from splashing out of the sample disc when rotating.

[0022] Further, the bottom plate and the side wall are integrally formed, which can reduce signal attenuation and distortion in the propagation path generated when the material to be measured rotates, and further can collect more stable signals, so that the analysis result is more accurate.

[0023] Further, the side wall is provided with at least one plane perpendicular to the surface of the bottom plate, and the plane is used to install the acoustic emission sensor, so that the acoustic emission sensor is more stable during work, and further can more accurately collect the transient elastic wave generated when the material to be measured rotates, so that the analysis result is more accurate.

[0024] Further, at least one observation port is formed in the sample disc, and the observation port penetrates the side wall, so that the experimenter can more conveniently observe the material to be measured in real time.

[0025] Further, the side wall has magnetism, and a ferromagnetic material is arranged at one end of the acoustic emission sensor close to the side wall, so that the acoustic emission sensor is fixed on the corresponding position of the plane through magnetic force, and the installation stability of the acoustic emission sensor is further ensured.

[0026] Further, one end of the rotating part towards the sample disc is provided with a rotating head in a conical shape, and the tip of the rotating head is close to the sample disc, so that the material to be measured can generate greater shear deformation when rotating and the interference with the propagation of the transient elastic wave is reduced, so that the analysis result is more accurate.

[0027] Further, the rotating rheometer further comprises a preamplifier connected with the acoustic emission sensor, so as to amplify the transient elastic wave signal collected by the acoustic emission sensor, so that the analysis result is more accurate.

[0028] Further, the fixing part and the rotating part are both made of high-strength alloy steel, and the high-strength alloy steel has strong wear resistance and corrosion resistance, so that the service life of the parallel plate clamp is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure schematic view of the parallel plate clamp of the rotating rheometer based on the acoustic emission sensor.

[0030] Figure 2 It is a structure top view of the parallel plate clamp of the rotating rheometer based on the acoustic emission sensor.

[0031] Figure 3 It is a structure side view of the parallel plate clamp of the rotating rheometer based on the acoustic emission sensor.

[0032] Figure 4 The utility model discloses a parallel plate fixture of rotary rheometer based on acoustic emission sensor's structure section view.

[0033] In the drawing:

[0034] 1, fixed part;11, sample disc;111, bottom plate;112, side wall;1121, plane;113, observation port;12, connecting seat;2, rotating part;21, rotating head;3, acoustic emission sensor. DETAILED DESCRIPTION

[0035] In order to make the purpose and the advantage of the utility model more clearly, the utility model is further described below with examples;It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0036] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not used to limit the protection scope of the utility model.

[0037] It should be noted that, in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and are not indicative or suggestive of the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0038] In addition, it should also be noted that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Please refer to Figures 1 to 4 Among them, Figure 1 It is a structure schematic view of a parallel plate fixture of rotary rheometer based on acoustic emission sensor 3 of the utility model embodiment, Figure 2 It is a structure top view of a parallel plate fixture of rotary rheometer based on acoustic emission sensor 3 of the utility model embodiment, Figure 3 It is a structure side view of a parallel plate fixture of rotary rheometer based on acoustic emission sensor 3 of the utility model embodiment, Figure 4The utility model discloses a parallel plate fixture of rotary rheometer based on acoustic emission sensor 3's structure section view of embodiment one. In this embodiment, the parallel plate fixture of the utility model includes fixed part 1, rotating part 2 and acoustic emission sensor 3;Among them, fixed part 1 includes the connecting seat 12 connected with rotary rheometer and the sample disc 11 set at the top of connecting seat 12, and the sample disc 11 is used to load the material to be measured;Rotating part 2 is set above sample disc 11 and is driven by rotary rheometer so as to be moved along the vertical direction, and rotating part 2 does not interfere with sample disc 11 during the movement, and rotating part 2 is also driven by rotary rheometer so as to rotate around the rotating shaft, and rotating part 2 rotates with the material to be measured rotating;Acoustic emission sensor 3 is set on sample disc 11 and is used to collect the instantaneous elastic wave generated when the material to be measured rotates at close range.

[0040] Specifically, the utility model first fixes and connects sample disc 11 to rotary rheometer through connecting seat 12, so that sample disc 11 remains stable and does not move, then places the material to be measured to sample disc 11, and then drives rotating part 2 to move along the vertical direction through rotary rheometer, until rotating part 2 and sample disc 11 cooperate to clamp and fix the material to be measured at the corresponding position of sample disc 11, then rotary rheometer continues to drive rotating part 2 to rotate around its rotating shaft, so as to rotate with the material to be measured at the corresponding rotating speed, at this time, acoustic emission sensor 3 set on sample disc 11 can collect the instantaneous elastic wave generated when the material to be measured rotates, and further make the rotary rheometer further collect the instantaneous elastic wave generated by the material to be measured on the basis of collecting the rheological characteristic signal of the material to be measured, so that the analysis result is closer to the real state of the material to be measured.

[0041] Please refer to Figure 2 In this embodiment, the sample disc 11 of the utility model includes bottom plate 111 and side wall 112;Among them, the bottom plate 111 is connected with the connecting seat 12, and the bottom plate 111 is fixedly connected with the rotary rheometer through the connecting seat 12, so that the material to be measured can be loaded through the bottom plate 111;The side wall 112 is arranged at the edge of bottom plate 111, and the side wall 112 is used to install acoustic emission sensor 3, since the instantaneous elastic wave belongs to weak stress wave, therefore, acoustic emission sensor 3 installed on side wall 112 can collect the instantaneous elastic wave at close range, and at the same time, side wall 112 surrounds the edge of bottom plate 111 to form a circle, which can surround the material to be measured, prevent the material to be measured from splashing out of sample disc 11 when rotating, so that the experimental process is safer.

[0042] Further, the bottom plate 111 and the side wall 112 are integrally formed, so that the sample disc 11 has a whole structure, the attenuation and distortion of various signal waves generated when the material to be measured rotates can be effectively reduced, and more stable signals can be collected, so that the analysis result is more accurate.

[0043] As shown in Figure 3 In the embodiment, the side wall 112 is provided with at least one plane 1121 perpendicular to the surface of the bottom plate 111, and the plane 1121 is used to install the acoustic emission sensor 3, so that the acoustic emission sensor 3 is more stable during work, and the transient elastic wave generated when the material to be measured rotates can be more accurately collected, so that the analysis result is more accurate.

[0044] As shown in Figures 1 to 3 The sample disc 11 is provided with at least one observation port 113 for observing the state of the material to be measured, and each observation port 113 penetrates the side wall 112, so that the experimental personnel can more conveniently observe the material to be measured in real time.

[0045] Further, the side wall 112 has magnetism, and one end of the acoustic emission sensor 3 close to the side wall 112 is provided with a ferromagnetic material, which is used to be fixed on the corresponding position of the plane 1121 through magnetic force, so as to further ensure the installation stability of the acoustic emission sensor 3, and also facilitate the experimental personnel to install and dismount the acoustic emission sensor 3 from the side wall 112.

[0046] In other embodiments, the acoustic emission sensor 3 can be installed on the corresponding position of the plane 1121 through bolt connection or pin connection.

[0047] As shown in Figure 4 In the embodiment, one end of the rotating part 2 towards the sample disc 11 is provided with a rotating head 21 in a conical shape, and the tip of the rotating head 21 is close to the sample disc 11. Specifically, when the rotating part 2 and the sample disc 11 clamp the material to be measured, the tip of the rotating head 21 first contacts the material to be measured, and then the conical surface of the rotating head 21 contacts the material to be measured, so that the material to be measured can generate greater shear deformation when rotating and reduce the interference with the propagation of transient elastic waves, so that the analysis result is more accurate.

[0048] Further, the rotating rheometer further comprises a preamplifier (not shown in the figure) connected with the acoustic emission sensor 3, the preamplifier can amplify the transient elastic wave signal collected by the acoustic emission sensor 3, and then the data acquisition unit (not shown in the figure) can accurately collect the related signal, so that the analysis result is more accurate. Specifically, after the acoustic emission sensor 3 collects the signal of the transient elastic wave, the signal is transmitted to the preamplifier, the transient elastic wave is amplified through the preamplifier, and the amplified transient elastic wave is transmitted to the data acquisition unit.

[0049] Further, the fixing part 1 and the rotating part 2 in the utility model are both made of high-strength alloy steel, the high-strength alloy steel has wear resistance and corrosion resistance, and then the service life of the parallel plate clamp is improved.

[0050] At this point, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the utility model, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.

[0051] The above is only the preferred embodiment of the utility model and is not used to limit the utility model, and the utility model can have various changes and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A parallel plate fixture for a rotational rheometer based on acoustic emission sensors, characterized in that, The application relates to a rotating rheometer, which comprises: a fixing part for loading materials to be tested, which comprises a connecting seat connected with a rotating rheometer and a sample disc arranged at the top end of the connecting seat; a rotating part located above the sample disc and capable of moving in a vertical direction to fix the materials to be tested at corresponding positions on the sample disc; the rotating part is also capable of rotating around the moving direction as a rotating shaft to drive the materials to be tested to rotate at corresponding rotating speeds; an acoustic emission sensor arranged on the sample disc to collect transient elastic waves generated by the materials to be tested when the materials rotate.

2. The acoustic emission sensor based rotational rheometer parallel plate fixture of claim 1, wherein, The sample disc comprises: a bottom plate connected with the connecting seat to load the materials to be tested; a side wall arranged at the edge of the bottom plate to install the acoustic emission sensor.

3. The acoustic emission sensor based rotational rheometer parallel plate fixture of claim 2, wherein, The bottom plate and the side wall are integrally formed.

4. The acoustic emission sensor based rotational rheometer parallel plate fixture of claim 2, wherein, The side wall is provided with at least one plane perpendicular to the surface where the bottom plate is located to install the acoustic emission sensor.

5. The acoustic emission sensor-based rotational rheometer parallel plate fixture of claim 2, wherein, The sample disc is provided with at least one observation port to observe the state of the materials to be tested, and each observation port penetrates the side wall.

6. The acoustic emission sensor-based rotational rheometer parallel plate fixture of claim 2, wherein, The side wall has magnetism.

7. The acoustic emission sensor-based rotational rheometer parallel plate fixture of claim 4, wherein, The acoustic emission sensor is provided with ferromagnetic material close to one end of the side wall to be fixed at corresponding positions on the plane through magnetic force.

8. The acoustic emission sensor-based rotational rheometer parallel plate fixture of claim 1, wherein, One end of the rotating part towards the sample disc is provided with a rotating head in a conical shape, and the tip of the rotating head is close to the sample disc.

9. The acoustic emission sensor-based rotational rheometer parallel plate fixture of claim 1, wherein, The rotating rheometer further comprises a preamplifier connected with the acoustic emission sensor to amplify the transient elastic wave signals collected by the acoustic emission sensor.

10. The acoustic emission sensor based rotational rheometer parallel plate fixture of any of claims 1-9, wherein, The fixing part and the rotating part are both made of high-strength alloy steel.

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