Tensioning wheel device with surface composite texture

Abstract

The invention is applicable to the technical field of tensioning wheel devices, and provides a tensioning wheel device with a surface composite texture, which comprises a tensioning wheel main body, the tensioning wheel main body is provided with a surface in contact with the belt back of a poly V-belt, and the surface is provided with the composite texture. The composite texture comprises a composite texture formed by combining a crossed texture, a multi-arc texture and a round pit texture. Through the design of the composite texture on the surface of the tensioning wheel, full attachment between the tensioning wheel and the poly V-belt back is achieved, and the relative sliding phenomenon is effectively restrained; meanwhile, the stress distribution and the stress intensity of the contact surface are improved, and the vibration and noise level of the friction surface is remarkably reduced; abrasion caused by insufficient friction force is avoided, and the reliability and stability of a transmission system are ensured; and the transmission efficiency is improved, and the service life of the tensioning wheel is prolonged, so that the maintenance cost of equipment and the frequency of replacing the tensioning wheel are obviously reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of tensioner devices, and particularly relates to a tensioner device with a surface composite texture. Background Art

[0002] Tensioner devices are widely used in various mechanical equipment to maintain the tension force of the transmission system and the stability of operation. It reduces the span of the belt section by maintaining the tension force of the multi-wedge belt. The tensioner can increase the tension force between the multi-wedge belt and the pulley, but excessive tension will cause increased wear of the multi-wedge belt, shortening its service life. At the same time, the friction force between the multi-wedge belt and the tensioner increases, generating noise. On the contrary, if the tension force is insufficient, relative sliding will occur between the multi-wedge belt and the tensioner, which will not only reduce the transmission efficiency and stability but also increase energy loss, further shortening the service life of the multi-wedge belt.

[0003] Traditional tensioner designs usually adopt a smooth surface, but the smooth surface will cause phenomena such as slipping, sliding wear, and tangential vibration between the multi-wedge belt and the tensioner surface, which have a negative impact on the performance and stability of the transmission system. To address these challenges, current research mainly focuses on optimizing the tensioner structure and adjusting its installation position to reduce noise and improve system performance. However, there are few studies directly reducing frictional vibration and tangential slip by changing the contact interface topography. Therefore, the present invention proposes a tensioner device with a surface composite texture. Summary of the Invention

[0004] The purpose of the present invention is to provide a tensioner device with a surface composite texture, aiming to solve the problems raised in the above background art.

[0005] The purpose of the present invention is achieved through the following technical solutions: A tensioner device with a surface composite texture, including a tensioner main body, the tensioner main body having a surface in contact with the back of the multi-wedge belt, the surface having a composite texture, and the composite texture including a composite texture formed by a cross-texture shape texture, a multi-arc texture, and a circular pit texture; The cross-texture shape texture is located in the edge area of the tensioner surface, for suppressing the relative sliding of the multi-wedge belt on the tensioner surface and reducing the displacement of the multi-wedge belt; The multi-arc texture is located in the middle area of the tensioner surface, for reducing frictional vibration and noise caused by stick-slip; the circular pit texture is located below the arc of the multi-arc texture, for effectively suppressing the stick-slip phenomenon by enhancing the adsorption between the tensioner and the multi-wedge belt.

[0006] Further, the depth of the multi-circular arc texture is 0.5 mm; the radius of the multi-circular arcs in the multi-circular arc texture is 2 mm, the spacing is 1 mm, and the spacing between the multi-circular arcs is 4 mm.

[0007] Further, the diameter of the circular pits in the circular pit texture is 1 mm and the spacing is 1 mm.

[0008] Further, the width of the cross-texture shape texture is 5 mm and the depth is 0.5 mm; the angle between the cross-textures in the cross-texture shape texture is 90° and the spacing is 2 mm, and the width of the cross-texture is 0.1 mm.

[0009] Further, the concave pit area of the multi-circular arc texture is filled with a flexible material to moderately deform the tension pulley in the high-load area of the multi-wedge belt.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the composite texture design on the surface of the tension pulley, the present invention realizes the full fit between the tension pulley and the back of the multi-wedge belt, effectively suppressing the occurrence of relative sliding.

[0011] 2. The composite texture in the present invention interrupts the continuous contact between the back of the multi-wedge belt and the surface of the tension pulley, thereby improving the stress distribution and stress intensity of the contact surface, and significantly reducing the vibration and noise levels of the friction surface.

[0012] 3. Compared with the design of the traditional tension pulley without texture on the surface, the present invention avoids the serious wear problem caused by insufficient friction, ensuring the reliability and stability of the transmission system. The tension pulley device with the composite texture can significantly reduce the generation of noise and vibration, and effectively prevent the jumping or falling off of the transmission belt.

[0013] 4. Compared with the disadvantage that the texture in the friction system is easy to wear and lose its function, the present invention fills the flexible material inside the texture, greatly increasing the service life of the texture, thereby increasing the service life of the tension pulley and the multi-wedge belt.

[0014] 5. By optimizing the surface texture design, the present invention improves the transmission efficiency, reduces the surface friction vibration, and thus significantly extends the service life of the tension pulley. Due to its longer service life and higher transmission efficiency, it can significantly reduce the maintenance cost of the equipment and the frequency of replacing the tension pulley. Description of the Drawings

[0015] Figure 1 It is the time-domain diagram of different surface vibration signals in Test 1, where (a) is the time-domain diagram of the vibration signal of the non-textured surface in Test 1, and (b) is the time-domain diagram of the vibration signal of the textured surface in Test 1.

[0016] Figure 2 Frequency domain diagrams of different surface vibration signals in Test 1; among them, (a) is the frequency domain diagram of the vibration signal of the non-textured surface, and (b) is the frequency domain diagram of the vibration signal of the textured surface.

[0017] Figure 3 Time domain diagrams of different surface vibration signals when the relative sliding speed is 0.34 m / s in Test 2; among them, (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding speed is 0.34 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding speed is 0.34 m / s.

[0018] Figure 4 Frequency domain diagrams of different surface vibration signals when the relative sliding speed is 0.34 m / s in Test 2.

[0019] Figure 5 Time domain diagrams of different surface vibration signals when the relative sliding speed is 1.7 m / s in Test 2; among them, (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding speed is 1.7 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding speed is 1.7 m / s.

[0020] Figure 6 Frequency domain diagrams of different surface vibration signals when the relative sliding speed is 1.7 m / s in Test 2.

[0021] Figure 7 Time domain diagrams of different surface vibration signals when the relative sliding speed is 3.4 m / s in Test 2; among them, (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding speed is 3.4 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding speed is 3.4 m / s.

[0022] Figure 8 Frequency domain diagrams of different surface vibration signals when the relative sliding speed is 3.4 m / s in Test 2.

[0023] Figure 9 Bar charts of different surface noise signals in Tests 1 and 2 Figure 10 Schematic structural diagrams of the device in the present invention; among them, (a) is the three-dimensional diagram of the device, and (b) is the front view of the device.

[0024] Figure 11 Schematic structural diagram of the composite texture.

[0025] Figure 12 Schematic structural diagram of the cross-texture type texture.

[0026] In the figure: 1 - Tension wheel body. Specific implementation manners

[0027] For a clearer understanding of the technical features, objectives, and beneficial effects of the present invention, the following provides a detailed description of the technical solution of the present invention, but it should not be construed as a limitation on the implementable scope of the present invention.

[0028] The present invention provides a tension pulley device with a surface composite texture, as Figures 7 - 12 shown, including a tension pulley body 1. The tension pulley body 1 has a surface that contacts the back of the multi-wedge belt. The surface has a composite texture, which includes a composite texture formed by a cross-texture shape texture, a multi-arc texture, and a circular pit texture. The surface texture of the tension pulley body 1 is processed by laser processing technology.

[0029] The cross-texture shape texture is located in the edge area of the tension pulley surface, and is used to inhibit the relative sliding of the multi-wedge belt on the tension pulley surface and reduce the displacement of the multi-wedge belt, thereby improving the stability and working efficiency of the transmission system. The width of the cross-texture shape texture is 5 mm, and the depth is 0.5 mm; the angle between the cross-textures in the cross-texture shape texture is 90°, the spacing is 2 mm, and the width of the cross-texture is 0.1 mm.

[0030] The multi-arc texture is located in the middle area of the tension pulley surface, and is used to reduce the friction vibration and noise caused by adhesion-sliding. The depth of the multi-arc texture is 0.5 mm; the radius of the multi-arcs in the multi-arc texture is 2 mm, the spacing is 1 mm, and the spacing between the multi-arcs is 4 mm. The concave pit area of the multi-arc texture is filled with a flexible material, and the material includes, but is not limited to, relatively soft materials such as polyurethane or graphite. Through the filling design of the flexible material, the tension pulley can be moderately deformed in the high-load area of the multi-wedge belt, thereby absorbing impact energy, alleviating the concentrated distribution of stress, and significantly extending the service life of the surface texture of the tension pulley, and further extending the service life of the tension pulley and the multi-wedge belt.

[0031] The circular pit texture is located below the arc of the multi-arc texture, and is used to effectively inhibit the adhesion-sliding phenomenon by enhancing the adsorption between the tension pulley and the multi-wedge belt, thereby further improving the tribological performance of the tension pulley. The diameter of the circular pits in the circular pit texture is 1 mm, and the spacing is 1 mm.

[0032] The following provides a detailed description of the specific implementation of the present invention in combination with specific embodiments.

[0033] Example 1: To verify the influence of the composite texture on the belt drive system in actual conditions, a tension pulley without texture and a tension pulley with composite texture were respectively installed in the belt drive system to measure vibration signals and noise signals.

[0034] 1) Test parameters: 1. Tension force: 300 N, rotational speed of the driving pulley: 1000 rpm; 2. Position of the idler pulley: Located at the middle position between the two belt pulleys; 3. Dimensions of the belt pulleys: Diameter is 65 mm, center distance between the two pulleys is 500 mm; 4. Measurement of vibration signals: Use a Doppler laser displacement sensor to align with the contact area between the idler pulley and the back of the belt for vibration signal acquisition.

[0035] 5. Measurement of noise signals: In order to measure the noise signals between the idler pulley and the back of the belt, fix a sound pressure sensor at 3 - 4 mm from the contact point between the idler pulley and the back of the belt for noise signal acquisition.

[0036] 6. Rotational speed of the idler pulley: Measured using an encoder.

[0037] 2) Test process: 1. In order to analyze the influence of the surface texture of the idler pulley on the friction vibration between the idler pulley and the back of the belt under normal rotation conditions (i.e., relative sliding speed is 0 m / s), measure the vibration signals between the idler pulley and the back of the belt under the conditions of a tension force of 300 N and a rotational speed of 1000 rpm. 2. In order to analyze the suppression effect of the surface texture of the idler pulley on the friction vibration and noise generated by stick - slip noise, during the test process, control the rotational speed of the idler pulley by applying a damping device to the bearing of the idler pulley, and then control the relative sliding speed between the idler pulley and the back of the belt. When the relative sliding speed between the idler pulley and the back of the belt is 0.34 m / s, 1.7 m / s, and 3.4 m / s, measure the vibration signals between the idler pulley and the back of the belt.

[0038] 3) Test results and analysis: Test 1: Install the non - textured idler pulley and the composite - textured idler pulley in the belt drive system, and measure the vibration signals of the contact surfaces between the non - textured idler pulley, the composite - textured idler pulley and the back of the belt in the belt drive system under the same tension force.

[0039] Figure 1 Figure (a) in 2 is the time - domain diagram of the vibration signals at the idler pulley and the back of the belt when the relative sliding speed between the idler pulley and the back of the belt is 0 m / s. The vibration amplitude between the non - textured idler pulley and the back of the belt is 0.2 m / s 2 ( Figure 1 in (a)), and the vibration amplitude between the textured idler pulley and the back of the belt is 0.205 m / s 2 ( Figure 1 in (b)). The vibration amplitudes are close. The time - domain signals indicate that under the normal operation of the idler pulley, the presence or absence of the surface texture of the idler pulley has little influence on the vibration between the idler pulley and the back of the belt.

[0040] Figure 2When the relative sliding speed between the tension pulley and the belt back is 0 m / s, the main frequency of both surface vibration signals is 350 Hz ( Figure 2 as shown in (a) and (b) in ), indicating that the texture has little effect on the friction system. When the frequency is between 2000 - 5000 Hz, the energy proportion is very small and there is no peak, indicating that when the relative sliding speed is 0 m / s, there is no relative sliding between the tension pulley and the belt back and no high-frequency stick-slip vibration occurs. At the same time, the auto-power spectral density distributions of the tension pulley surface without texture and with texture basically coincide in the high-frequency part. Therefore, the texture processed on the tension pulley surface has little effect on the vibration between the tension pulley and the belt back.

[0041] Experiment 2: When the relative sliding speeds between the tension pulley and the belt back are 0 m / s, 0.34 m / s, 1.7 m / s, and 3.4 m / s, measure their vibration signals and analyze the time domain and frequency domain of the vibration signals.

[0042] Figure 3 Figure (a) in 2 is the time domain diagram of the vibration signal between the tension pulley without texture and the belt back when the relative sliding speed is 0.34 m / s. When the relative sliding speed is 0.34 m / s, the vibration amplitude between the tension pulley without texture and the belt back is 0.34 m / s Figure 3 ; the vibration amplitude between the textured tension pulley and the belt back is 0.30 m / s 2 as shown in (b) in Figure 3 . At this time, the texture processed on the tension pulley surface can reduce the friction vibration by 11.7%.

[0043] Figure 4 Figure is the frequency domain diagram of the vibration signal between the tension pulley and the belt back when the relative sliding speed is 0.34 m / s. It can be seen that in addition to the main frequency of 350 Hz, the main frequency of 750 Hz also appears in both surface vibration signals. The auto-power spectral densities basically coincide below 1000 Hz, indicating that the texture processed on the tension pulley surface has little effect on the friction system and no additional friction vibration will occur at low frequencies; when the frequency is between 200 - 5000 Hz, due to the relative sliding between the tension pulley and the belt back, the energy proportion of the vibration signal of the surface without texture increases at high frequencies. This is because the adhesion-sliding generates high-frequency friction vibration; it can be seen from the frequency domain diagram of the vibration signal of the textured tension pulley surface that the energy proportion is relatively small at 2000 - 5000 Hz, and it has a more obvious effect on reducing the high-frequency vibration energy value at 2600 - 5000 Hz, indicating that the texture can reduce the high-frequency friction vibration generated by the stick-slip.

[0044] Figure 5When the relative sliding speed is 1.7 m / s, it is the time-domain diagram of the vibration signal between the tension pulley and the belt back. When the relative sliding speed is 1.7 m / s, the vibration amplitude between the non-textured tension pulley and the belt back is 0.96 m / s 2 ( Figure 5 in (a) of 2 ( Figure 5 in (b) of

[0045] Figure 6 When the relative sliding speed is 1.7 m / s, it is the frequency-domain diagram of the vibration signal between the tension pulley and the belt back. In addition to the main frequencies of 350 Hz and 750 Hz appearing on both surfaces, the auto-power spectral density is basically the same below 1000 Hz, indicating that the textured surface of the tension pulley has little influence on the friction system when the relative sliding speed is 1.7 m / s, and no additional main-frequency friction vibration will be generated at low frequencies. When the frequency is between 2500 - 5000 Hz, due to the increase in the relative sliding speed, the high-frequency friction vibration generated by adhesion-sliding increases, making the proportion of the vibration signal of the non-textured surface continue to increase at high frequencies. It can be seen from the frequency-domain diagram of the vibration signal of the textured surface that the energy proportion at 2000 - 5000 Hz is smaller than that of the non-textured surface, and the effect of reducing the high-frequency vibration energy value at 2500 - 5000 Hz is more obvious, indicating that the texture can reduce the high-frequency friction vibration generated by stick-slip when the relative sliding speed is 1.7 m / s.

[0046] Figure 7 When the relative sliding speed is 3.4 m / s, it is the time-domain diagram of the vibration signal between the tension pulley and the belt back. When the relative sliding speed is 3.4 m / s, the vibration amplitude between the non-textured tension pulley and the belt back is 1.7 m / s 2 ( Figure 7 in (a) of 2 ( Figure 7 in (b) of

[0047] Figure 8It is the frequency-domain diagram of the vibration signal between the tension pulley and the belt back when the relative sliding speed is 3.4 m / s. Through frequency-domain analysis of the vibration signals of two different surfaces, except for the main frequencies of 350 Hz and 750 Hz that appear jointly, the auto-power spectral density is basically coincident below 1000 Hz, indicating that the machined texture on the surface of the tension pulley has little influence on the friction system when the relative sliding speed is 3.4 m / s and no friction vibration of other main frequencies will be generated at low frequencies. When the frequency is between 2500 - 5000 Hz, since the relative sliding speed reaches the maximum, the high-frequency friction vibration generated due to stick-slip increases, making the proportion of the vibration signal of the non-textured surface reach the maximum at high frequencies. It can be seen from the frequency-domain diagram of the vibration signal of the textured surface that the energy proportion at 2000 - 5000 Hz is smaller than that of the non-textured surface, and its effect on reducing the high-frequency vibration energy value at 2500 - 5000 Hz is more obvious, indicating that the texture can reduce the high-frequency friction vibration generated by stick-slip when the relative sliding speed is 3.4 m / s.

[0048] Figure 9 It is the columnar diagram of the noise of different textured surfaces. It can be seen from the figure that as the relative speed increases, the noise of the non-textured surface and the textured surface gradually increases, and the noise signal of the textured surface is always less than that of the non-textured surface. When the relative sliding speed is 0 m / s, the sound pressures of the non-textured surface and the textured surface are 50 dB and 50.5 dB respectively, and the sound pressures are close. When the relative sliding speed is 0.34 m / s, the sound pressures of the non-textured surface and the textured surface are 65 dB and 60 dB respectively, and the texture reduces the sound pressure by 8%; when the relative sliding speed is 1.7 m / s, the sound pressures of the non-textured surface and the textured surface are 85 dB and 76 dB respectively, and the texture reduces the sound pressure by 10%; when the relative sliding speed is 1.7 m / s, the sound pressures of the non-textured surface and the textured surface are 95 dB and 80 dB respectively, and the texture reduces the sound pressure by 13%. As the relative sliding speed increases, the effect of the texture on reducing friction vibration is better, which is consistent with the influence law of the texture on friction vibration.

[0049] Conclusion: The machined texture on the surface of the tension pulley can reduce the friction vibration caused by stick-slip, the negative slope of the friction force-relative speed relationship, friction and wear, etc. between the tension pulley and the belt back. The test results show that as the sliding speed increases, the reduction effect becomes more significant, and the overall reduction range is between 11.7 - 29.4%. In addition, the texture significantly reduces the friction vibration in the high-frequency part of 2500 - 5000 Hz, and the energy value of its vibration signal is always lower than that of the non-textured surface in the range of 2500 - 5000 Hz.

[0050] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent.

Claims

1. A tensioner device with a surface composite texture, comprising a tensioner body, characterized in that, The surface of the tension pulley body contacts the belt back of the multi-wedge belt, and the surface has a composite texture, which includes a composite texture formed by combining a cross-texture shape texture, a multi-arc texture, and a circular pit texture; The cross-texture shape texture is located in the edge area of the tension pulley surface, and is used to inhibit the relative sliding of the multi-wedge belt on the tension pulley surface and reduce the displacement of the multi-wedge belt; The multi-arc texture is located in the middle area of the tension pulley surface and is used to reduce the friction vibration and noise caused by stick-slip; the circular pit texture is located below the arc of the multi-arc texture and is used to effectively inhibit the stick-slip phenomenon by enhancing the adsorption between the tension pulley and the multi-wedge belt.

2. The tension pulley device with a surface composite texture according to claim 1, characterized in that, The depth of the multi-arc texture is 0.5 mm; the radius of the multi-arcs in the multi-arc texture is 2 mm, the spacing is 1 mm, and the spacing between the multi-arcs is 4 mm.

3. The tension pulley device with a surface composite texture according to claim 1, characterized in that, The diameter of the circular pits in the circular pit texture is 1 mm and the spacing is 1 mm.

4. The tensioner device with a surface composite texture according to claim 1, characterized in that, The width of the cross-texture shape texture is 5 mm and the depth is 0.5 mm; the angle between the cross-textures in the cross-texture shape texture is 90°, the spacing is 2 mm, and the width of the cross-texture is 0.1 mm.

5. The tensioner device with a surface composite texture according to claim 1, wherein, The concave pit area of the multi-arc texture is filled with a flexible material to moderately deform the tension pulley in the high-load area of the multi-wedge belt.

Images