Tensioning wheel device with surface composite texture

Abstract

The present invention is applicable to the technical field of tensioning pulley devices, and provides a tensioning pulley device with a surface composite texture, comprising a tensioning pulley body, wherein the tensioning pulley body has a surface that contacts the back of a multi-V belt, and the surface has a composite texture, wherein the composite texture includes a composite texture composed of a cross-grain texture, a multi-arc texture, and a circular pit texture. The present invention achieves a full fit between the tensioning pulley and the back of the multi-V belt through the composite texture design on the tensioning pulley surface, effectively suppressing the occurrence of relative sliding; at the same time, it improves the stress distribution and stress intensity of the contact surface, significantly reducing the vibration and noise level of the friction surface; avoids wear caused by insufficient friction, and ensures the reliability and stability of the transmission system; improves transmission efficiency and extends the service life of the tensioning pulley, thereby significantly reducing the maintenance cost of the equipment and the frequency of tensioning pulley replacement.

Description

Technical Field

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

[0002] Tensioner pulleys are widely used in various mechanical equipment to maintain transmission system tension and operational stability. They maintain the tension of the poly-V belt to reduce the span of the belt segment. Tensioners increase the tension between the poly-V belt and the pulley, but excessive tension can lead to increased belt wear and shorten its service life. It also increases friction between the poly-V belt and the tensioner, generating noise. Conversely, insufficient tension can cause relative slip between the poly-V belt and the tensioner, reducing transmission efficiency and stability while increasing energy loss and further shortening the belt's service life.

[0003] Traditional tensioner designs typically use smooth surfaces, but these surfaces can cause slippage, sliding wear, and tangential vibration on the poly-V belt and tensioner surfaces, negatively impacting the performance and stability of the transmission system. To address these challenges, current research focuses on optimizing the tensioner structure and adjusting its installation position to reduce noise and improve system performance. However, research on reducing friction vibration and tangential slip by directly changing the contact interface morphology is still rare. To this end, the present invention proposes a tensioner device with a composite surface texture. Summary of the Invention

[0004] The object of the present invention is to provide a tensioning pulley device with a surface composite texture, aiming to solve the problems raised in the above background technology.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A tensioning pulley device with a composite surface texture includes a tensioning pulley body, wherein the tensioning pulley body has a surface that contacts the back of a multi-V belt, and the surface has a composite texture, wherein the composite texture includes a composite texture composed of a cross-grain texture, a multi-circular arc texture, and a circular pit texture;

[0007] The cross-grain texture is located at the edge area of the tensioning wheel surface, which is used to inhibit the relative sliding of the multi-V belt on the tensioning wheel surface and reduce the displacement of the multi-V belt;

[0008] The multi-arc texture is located in the middle area of the tensioning pulley surface, and is used to reduce friction vibration and noise caused by adhesion-slip; the circular pit texture is located below the arc line of the multi-arc texture, and is used to effectively suppress the adhesion-slip phenomenon by enhancing the adsorption between the tensioning pulley and the multi-V belt.

[0009] Furthermore, the depth of the multi-arc texture is 0.5 mm; the radius of the multi-arc in the multi-arc texture is 2 mm, the spacing is 1 mm, and the spacing between the multi-arcs is 4 mm.

[0010] Furthermore, the diameter of the circular pits in the circular pit texture is 1 mm and the spacing is 1 mm.

[0011] Furthermore, the width of the cross-grain texture is 5 mm and the depth is 0.5 mm; the angle between the cross-grain textures in the cross-grain texture is 90°, the spacing is 2 mm, and the width of the cross-grain texture is 0.1 mm.

[0012] Furthermore, the multi-arc textured concave area is filled with flexible material to enable the tensioning wheel to deform moderately in the high-load area of the poly-V belt.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention achieves full fit between the tensioner and the back of the multi-V belt through the composite texture design on the surface of the tensioner, effectively suppressing the occurrence of relative sliding.

[0015] 2. The composite texture in the present invention interrupts the continuous contact between the back of the poly-V belt and the surface of the tensioning wheel, thereby improving the stress distribution and stress intensity of the contact surface and significantly reducing the vibration and noise level of the friction surface.

[0016] 3. Compared to conventional tensioner pulley designs with untextured surfaces, this design avoids the severe wear caused by insufficient friction, ensuring the reliability and stability of the transmission system. The tensioner pulley with a composite texture significantly reduces noise and vibration, and effectively prevents belt jump or fall-off.

[0017] 4. Compared with the disadvantage that the texture is easily worn and loses its function in the friction system, the present invention fills the texture with flexible material, which greatly increases the service life of the texture, thereby increasing the service life of the tensioner and the multi-V belt.

[0018] 5. This invention significantly extends the service life of the tensioner by optimizing the surface texture design, improving transmission efficiency and reducing surface friction vibration. This longer service life and higher transmission efficiency significantly reduce equipment maintenance costs and the frequency of tensioner replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 These are the time domain diagrams of vibration signals of different surfaces in Experiment 1, where (a) is the time domain diagram of the vibration signal of the non-textured surface in Experiment 1, and (b) is the time domain diagram of the vibration signal of the textured surface in Experiment 1.

[0020] Figure 2 Frequency domain diagrams of vibration signals of different surfaces in Experiment 1; (a) is the frequency domain diagram of the vibration signal of the untextured surface, and (b) is the frequency domain diagram of the vibration signal of the textured surface.

[0021] Figure 3 These are the time domain diagrams of vibration signals of different surfaces when the relative sliding velocity is 0.34 m / s in experiment 2, where (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding velocity is 0.34 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding velocity is 0.34 m / s.

[0022] Figure 4 This is the frequency domain diagram of the vibration signals of different surfaces when the relative sliding speed is 0.34m / s in experiment 2.

[0023] Figure 5 These are the time domain diagrams of the vibration signals of different surfaces when the relative sliding velocity is 1.7 m / s in Experiment 2, where (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding velocity is 1.7 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding velocity is 1.7 m / s.

[0024] Figure 6 This is the frequency domain diagram of the vibration signals of different surfaces when the relative sliding speed is 1.7m / s in experiment 2.

[0025] Figure 7 These are the time domain diagrams of vibration signals of different surfaces when the relative sliding velocity is 3.4 m / s in experiment 2, where (a) is the time domain diagram of the vibration signal of the non-textured surface when the relative sliding velocity is 3.4 m / s, and (b) is the time domain diagram of the vibration signal of the textured surface when the relative sliding velocity is 3.4 m / s.

[0026] Figure 8 This is the frequency domain diagram of the vibration signals of different surfaces when the relative sliding speed is 3.4m / s in experiment 2.

[0027] Figure 9 Histograms of different surface noise signals in experiments 1 and 2

[0028] Figure 10 Schematic diagram of the structure of the device of the present invention; (a) is a three-dimensional diagram of the device, and (b) is a front view of the device.

[0029] Figure 11 Schematic diagram of the composite texture structure.

[0030] Figure 12 Schematic diagram of the structure of cross-grain texture.

[0031] In the figure: 1-tensioning wheel body. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solution of the present invention is now described in detail below, but it should not be understood as limiting the scope of implementation of the present invention.

[0033] The present invention provides a tensioning wheel device with a surface composite texture, such as Figure 7-12 As shown, the idler pulley body 1 includes a surface that contacts the back of the multi-V belt. The surface of the idler pulley body 1 has a composite texture, which includes a cross-grain texture, a multi-arc texture, and a circular pit texture. The surface of the idler pulley body 1 is textured using laser processing technology.

[0034] The cross-grain texture, located at the edge of the tensioner, inhibits relative slippage of the V-ribbed belt on the tensioner and reduces displacement, thereby improving the stability and efficiency of the transmission system. The cross-grain texture is 5mm wide and 0.5mm deep. The cross-grain texture has a 90° angle between the cross grains, a 2mm spacing, and a width of 0.1mm.

[0035] The multi-arc texture is located in the middle area of the tensioner surface and is used to reduce friction vibration and noise caused by adhesion and sliding. The depth of the multi-arc texture is 0.5mm; the radius of the multi-arc in the multi-arc texture is 2mm, the spacing is 1mm, and the spacing between the multi-arcs is 4mm. The pit area of the multi-arc texture is filled with flexible material, including but not limited to soft materials such as polyurethane or graphite. The filling design of the flexible material allows the tensioner to deform moderately in the high-load area of the multi-V belt, thereby absorbing impact energy, alleviating the concentrated distribution of stress, and significantly extending the service life of the tensioner surface texture, thereby extending the service life of the tensioner and the multi-V belt.

[0036] The circular pit texture, located below the arc of the multi-arc texture, is used to effectively suppress stick-slip by enhancing the adsorption between the tensioner and the multi-V belt, thereby further improving the tribological performance of the tensioner. The circular pits in the circular pit texture have a diameter of 1 mm and a spacing of 1 mm.

[0037] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0038] Example 1: In order to verify the influence of composite texture on the belt transmission system under actual conditions, a non-textured tensioner and a composite textured tensioner were installed in the belt transmission system to measure vibration signals and noise signals.

[0039] 1) Test parameters:

[0040] 1. Tensioning force: 300N, driving wheel speed 1000rpm;

[0041] 2. Position of the tensioner: located in the middle of the two pulleys;

[0042] 3. Pulley size: diameter is 65mm, and the center distance between the two wheels is 500mm;

[0043] 4. Vibration signal measurement: Use a Doppler laser displacement sensor to align with the contact area between the tensioner and the belt back to collect vibration signals.

[0044] 5. Noise signal measurement: In order to measure the noise signal between the tensioner and the belt back, the sound pressure sensor is fixed 3-4mm away from the contact point between the tensioner and the belt back to collect the noise signal.

[0045] 6. Tensioner speed: measured using an encoder.

[0046] 2) Test process:

[0047] 1. To analyze the effect of the tensioner's surface texture on the frictional vibration between the tensioner and the belt back under normal rotation (i.e., at a relative sliding speed of 0 m / s), the vibration signal between the tensioner and the belt back was measured at a tensioning force of 300 N and a rotational speed of 1000 rpm.

[0048] 2. In order to analyze the effect of the surface texture of the tensioner on the friction vibration and noise generated by adhesion-slip noise, during the test, a damping device was applied to the tensioner bearing to control the rotation speed of the tensioner, thereby controlling the relative sliding speed between the tensioner and the belt back. The vibration signal between the tensioner and the belt back was measured when the relative sliding speeds of the tensioner and the belt back were 0.34m / s, 1.7m / s, and 3.4m / s.

[0049] 3) Test results and analysis:

[0050] Test 1: Install a non-textured tensioner and a composite-textured tensioner in a belt drive system and measure the vibration signals at the contact surface between the non-textured tensioner, composite-textured tensioner, and the belt back under the same tension.

[0051] Figure 1 The time domain diagram of the vibration signal between the tensioner and the belt back when the relative sliding speed between the tensioner and the belt back is 0m / s. The vibration amplitude between the tensioner and the belt back without texture is 0.2m / s 2 ( Figure 1 In (a), the vibration amplitude between the texture tensioner and the belt back is 0.205m / s 2 ( Figure 1In (b), the vibration amplitudes are similar. The time domain signal shows that under normal operation of the tensioner, the presence or absence of the tensioner surface texture has little effect on the vibration between the tensioner and the belt back.

[0052] Figure 2 It shows that when the relative sliding speed between the tensioner and the belt back is 0m / s, both surface vibration signals have a main frequency of 350Hz ( Figure 2 Figures (a) and (b) show that the texture has little effect on the friction system. At 2000-5000Hz, the energy share is very small and no peak appears, indicating that when the relative sliding speed is 0m / s, there is no relative sliding and high-frequency stick-slip vibration between the tensioner and the belt back. At the same time, the power spectrum density distribution of the tensioner surface with and without texture is basically the same in the high-frequency part. Therefore, the texture of the tensioner surface has little effect on the vibration between the tensioner and the belt back.

[0053] Conclusion: When the tensioner works normally, the existence of the tensioner surface texture has little effect on the vibration between the tensioner and the belt back.

[0054] Test 2: When the relative sliding speeds between the tensioner and the belt back are 0 m / s, 0.34 m / s, 1.7 m / s, and 3.4 m / s, the vibration signals are measured and analyzed in the time and frequency domains.

[0055] Figure 3 This is the time domain diagram of the vibration signal between the tensioner and the belt back when the relative sliding speed is 0.34m / s. When the relative sliding speed is 0.34m / s, the vibration amplitude between the non-textured tensioner and the belt back is 0.34m / s 2 ( Figure 3 In (a), the vibration amplitude between the texture tensioner and the belt back is 0.30m / s 2 ( Figure 3 In (b), the surface texture of the tensioner can reduce the friction vibration by 11.7%.

[0056] Figure 4The figure below shows the frequency domain diagram of the vibration signal between the tensioner and the belt back at a relative sliding speed of 0.34 m / s. It can be seen that in addition to the main frequency of 350 Hz, the two surface vibration signals also have a main frequency of 750 Hz. Below 1000 Hz, the self-power spectrum density basically overlaps, indicating that the surface texture of the tensioner has little effect on the friction system and no other friction vibrations are generated at low frequencies. At 200-5000 Hz, due to the relative sliding between the tensioner and the belt back, the energy proportion of the vibration signal of the non-textured surface increases at high frequencies. This is due to the high-frequency friction vibrations generated by adhesion-slip. The frequency domain diagram of the vibration signal of the tensioner surface texture shows that the energy proportion is small at 2000-5000 Hz, and the effect of reducing the high-frequency vibration energy value at 2600-5000 Hz is more obvious, indicating that texture can reduce the high-frequency friction vibrations generated by stick-slip.

[0057] Figure 5 This is the time domain diagram of the vibration signal between the tensioner and the belt back when the relative sliding speed is 1.7m / s. When the relative sliding speed is 1.7m / s, the vibration amplitude between the non-textured tensioner and the belt back is 0.96m / s 2 ( Figure 5 In (a), the vibration amplitude between the texture tensioner and the belt back is 0.8m / s 2 ( Figure 5 In (b), the surface texture of the tensioner can reduce the friction vibration by 16.7%, which is more significant than when the relative sliding speed is 0.34 m / s.

[0058] Figure 6 The frequency domain diagram of the vibration signal between the tensioner and the belt back at a relative sliding speed of 1.7 m / s shows that, in addition to the main frequencies of 350 Hz and 750 Hz on both surfaces, the power spectrum density below 1000 Hz is essentially the same, indicating that the texture of the tensioner surface has little effect on the friction system at a relative sliding speed of 1.7 m / s, and does not generate friction vibrations of other main frequencies at low frequencies. When the frequency is between 2500 and 5000 Hz, the high-frequency friction vibrations generated by stick-slip increase as the relative sliding speed increases, causing the high-frequency proportion of the vibration signal on the untextured surface to continue to increase. The frequency domain diagram of the vibration signal on the textured surface shows that the energy proportion at 2000-5000 Hz is smaller than that of the untextured surface, and the effect of reducing the high-frequency vibration energy value at 2500-5000 Hz is more obvious, indicating that texture can reduce the high-frequency friction vibrations generated by stick-slip when the relative sliding speed is 1.7 m / s.

[0059] Figure 7 This is the time domain diagram of the vibration signal between the tensioner and the belt back when the relative sliding speed is 3.4m / s. When the relative sliding speed is 3.4m / s, the vibration amplitude between the non-textured tensioner and the belt back is 1.7m / s2 ( Figure 7 In (a), the vibration amplitude between the texture tensioner and the belt back is 1.2m / s 2 ( Figure 7 In (b), the surface texture of the tensioner can reduce friction vibration by 29.4%. In this case, the surface texture of the tensioner is most effective in reducing friction vibration.

[0060] Figure 8 The frequency domain plot of the vibration signal between the tensioner and belt back at a relative sliding speed of 3.4 m / s is shown. Frequency domain analysis of the vibration signals from the two different surfaces reveals that, with the exception of the common dominant frequencies of 350 Hz and 750 Hz, the auto-power spectral density (APD) is essentially identical below 1000 Hz. This indicates that the textured surface has minimal impact on the friction system at a relative sliding speed of 3.4 m / s, and friction vibrations at other dominant frequencies are not generated at low frequencies. At frequencies between 2500 and 5000 Hz, the relative sliding speed reaches its maximum, and the high-frequency friction vibrations generated by stick-slip increase, causing the high-frequency contribution of the vibration signal on the untextured surface to reach its maximum. The frequency domain plot of the vibration signal on the textured surface shows that the energy contribution in the 2000-5000 Hz range is lower than that on the untextured surface, and the effect of reducing the high-frequency vibration energy in the 2500-5000 Hz range is more pronounced, indicating that texture can reduce the high-frequency friction vibrations generated by stick-slip at a relative sliding speed of 3.4 m / s.

[0061] Figure 9 The following is a histogram of noise levels on different textured surfaces. As the relative speed increases, the noise levels on both the untextured and textured surfaces gradually increase, and the noise signal on the textured surface is consistently lower than that on the untextured surface. When the relative sliding speed is 0 m / s, the noise pressures on the untextured and textured surfaces are 50 dB and 50.5 dB, respectively, indicating a similar sound pressure. When the relative sliding speed is 0.34 m / s, the noise pressures on the untextured and textured surfaces are 65 dB and 60 dB, respectively, indicating an 8% reduction in noise pressure due to texture. When the relative sliding speed is 1.7 m / s, the noise pressures on the untextured and textured surfaces are 85 dB and 76 dB, respectively, indicating a 10% reduction in noise pressure due to texture. When the relative sliding speed is 1.7 m / s, the noise pressures on the untextured and textured surfaces are 95 dB and 80 dB, respectively, indicating a 13% reduction in noise pressure due to texture. As the relative sliding speed increases, the texture becomes more effective in reducing friction vibration, which is consistent with the influence of texture on friction vibration.

[0062] Conclusion: Textured surfaces on the tensioner can reduce frictional vibrations between the tensioner and the belt back caused by adhesion-slip, the negative slope of the friction-relative velocity relationship, and frictional wear. Test results show that the reduction becomes more pronounced with increasing sliding velocity, with an overall reduction ranging from 11.7% to 29.4%. Furthermore, texture significantly reduces frictional vibrations in the high-frequency range of 2500-5000 Hz, with the vibration signal energy consistently lower than that of untextured surfaces within this range.

[0063] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A tensioning wheel device with a surface composite texture, comprising a tensioning wheel body, characterized in that: The tensioning wheel body has a surface in contact with the belt back of the multi-V belt, and the surface has a composite texture, which includes a composite texture composed of a cross-grain texture, a multi-arc texture and a circular pit texture; The cross-grain texture is located at the edge area of the tensioning wheel surface, which is used to inhibit the relative sliding of the multi-V belt on the tensioning wheel surface and reduce the displacement of the multi-V belt; The multi-arc texture is located in the middle area of the tensioning pulley surface, and is used to reduce friction vibration and noise caused by adhesion-slip; the circular pit texture is located below the arc line of the multi-arc texture, and is used to effectively suppress the adhesion-slip phenomenon by enhancing the adsorption between the tensioning pulley and the multi-V belt.

2. The tensioning 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-arc 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 tensioning 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 tensioning pulley device with a surface composite texture according to claim 1, characterized in that: The width of the cross-grain texture is 5 mm and the depth is 0.5 mm. The angle between the cross-grain textures in the cross-grain texture is 90°, the spacing is 2 mm, and the width of the cross-grain texture is 0.1 mm.

5. The tensioning pulley device with a surface composite texture according to claim 1, characterized in that: The multi-arc textured concave area is filled with flexible material to enable the tensioning wheel to deform moderately in the high-load area of the poly-V belt.

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