Driving system of belt conveyor

Abstract

The invention discloses a driving system of a belt conveyor. The driving system comprises a conveying belt, the first transmission drum and the second transmission drum are used for driving the conveying belt, and the diameters of the first transmission drum and the second transmission drum are different; the first motor group is used for driving the first transmission roller; the second motor group is used for driving the second transmission roller; the tension detection device is arranged on the conveying belt and is used for detecting a tension value on the conveying belt; and the controller is used for adjusting the output power of the first motor group and the second motor group according to the tension value. According to the scheme, slipping of the transmission roller and the conveying belt can be avoided, and efficient and reliable operation of the conveying belt system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyors, and particularly to a drive system for a belt conveyor. Background Art

[0002] Belt conveyors are widely used in coal mines. Due to the power ratio and the layout of the tensioning device, the phenomenon of slippage between the driving drum and the conveyor belt is relatively prominent, which affects the transportation efficiency and safe production of the belt conveyor. Summary of the Invention

[0003] In view of the above defects, the present invention provides a drive system for a belt conveyor. The solution of the present application can avoid the slippage between the driving drum and the conveyor belt, and ensure the efficient and reliable operation of the conveyor belt system.

[0004] An embodiment of the present invention provides a drive system for a belt conveyor, the system comprising:

[0005] A conveyor belt;

[0006] A first driving drum and a second driving drum for driving the conveyor belt, the first driving drum and the second driving drum being configured with different diameters;

[0007] A first motor group for driving the first driving drum, and a second motor group for driving the second driving drum;

[0008] A tension detection device disposed on the conveyor belt for detecting the tension value on the conveyor belt;

[0009] A controller for adjusting the output power of the first motor group and the second motor group according to the tension value.

[0010] Preferably, the difference between the first diameter of the first driving drum and the second diameter of the second driving drum is not less than a preset diameter threshold;

[0011] The ratio of the maximum output power of the first motor group to the maximum output power of the second motor group is not less than a preset ratio threshold.

[0012] Preferably, the tension detection device is used to detect a first tension value of the conveyor belt on the first driving drum and a second tension value of the conveyor belt on the second driving drum;

[0013] The controller adjusts the ratio of the output power between the first motor group and the second motor group according to the first diameter of the first driving drum, the second diameter of the second driving drum, the first tension value and the second tension value.

[0014] Preferably, the controller is further configured to:

[0015] Detect the tension difference between the first tension value and the second tension value in real time, and calculate the difference ratio between the tension difference and the first tension value;

[0016] When the difference ratio is within a preset normal range, calculate the power ratio of the output powers between the first motor group and the second motor group according to a preset calculation model, and adjust the output powers of the first motor group and the second motor group with the preset power ratio.

[0017] Preferably, the calculation model is:

[0018]

[0019] Wherein, ΔT is the tension difference between the first tension value and the second tension value, μ1 is the friction coefficient of the first driving roller, μ2 is the friction coefficient of the second driving roller, D1 is the first diameter, D2 is the second diameter, and α is a preset correction coefficient.

[0020] Preferably, the controller is further configured to:

[0021] When the difference ratio is not within the normal range, increase the output power of the driving roller with the larger diameter among the first driving roller and the second driving roller at a preset first ratio, and decrease the output power of the other driving roller at a preset second ratio.

[0022] Preferably, the controller is further configured to:

[0023] When it is detected that both the first tension value and the second tension value are less than a preset tension threshold, decrease the output power of the driving roller with the smaller diameter among the first driving roller and the second driving roller at a preset third ratio.

[0024] Preferably, the ratio of the first diameter of the first driving roller to the second diameter of the second driving roller is a preset first diameter ratio;

[0025] When the controller receives a start signal, control the first motor group and the second motor group to start with a preset first power ratio.

[0026] Preferably, the first diameter ratio is 1.25;

[0027] The first power ratio is 2.5.

[0028] Preferably, the hardness of the end part of the driving roller with the larger diameter among the first driving roller and the second driving roller is higher than that of the middle part;

[0029] The surfaces of the first driving roller and the second driving roller are provided with spiral groove anti-slip patterns.

[0030] The driving system of the belt conveyor provided by the present invention includes a conveyor belt; a first driving roller and a second driving roller for driving the conveyor belt, the first driving roller and the second driving roller being configured with different diameters; a first motor group for driving the first driving roller, and a second motor group for driving the second driving roller; a tension detection device arranged on the conveyor belt for detecting the tension value on the conveyor belt; and a controller for adjusting the output power of the first motor group and the second motor group according to the tension value. The solution of the present application can avoid slipping between the driving roller and the conveyor belt, and ensure the efficient and reliable operation of the conveyor belt system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram of a driving system of a belt conveyor provided by an embodiment of the present invention;

[0032] Figure 2 FIG. is another schematic structural diagram of a driving system of a belt conveyor provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] An embodiment of the present invention provides a driving system of a belt conveyor, and the system includes:

[0035] A conveyor belt;

[0036] A first driving roller and a second driving roller for driving the conveyor belt, the first driving roller and the second driving roller being configured with different diameters;

[0037] A first motor group for driving the first driving roller, and a second motor group for driving the second driving roller;

[0038] A tension detection device arranged on the conveyor belt for detecting the tension value on the conveyor belt;

[0039] A controller for adjusting the output power of the first motor group and the second motor group according to the tension value.

[0040] During the specific implementation of this embodiment, refer to Figure 1 FIG., which is a schematic structural diagram of a driving system of a belt conveyor provided by an embodiment of the present invention, and the system includes:

[0041] Conveyor belt, Figure 1 is not shown in the figure.

[0042] The first driving roller 1 and the second driving roller 2 are used to drive the conveyor belt.

[0043] The first driving roller and the second driving roller are configured with different diameters;

[0044] The first motor set 3 for driving the first driving roller and the second motor set 4 for driving the second driving roller;

[0045] matching Figure 1 It consists of two motors and two driving rollers, is connected by a coupling, and is installed on the driving frame;

[0046] The design of assembling two motors to two driving rollers respectively realizes power distribution control from a hardware perspective. However, in order to obtain a more flexible power configuration, motors with different powers and driving rollers with different diameters can be selected.

[0047] For example, motors with powers of 1000kW, 630kW, 500kW, 315kW, and 200kW respectively, and driving rollers with diameters of 1000mm, 800mm, 630mm, and 500mm respectively can be selected. Through such a combination, motors and driving rollers can be freely matched according to specific working requirements and conditions to achieve more optimized power distribution.

[0048] The tension detection device configured on the conveyor belt is used to detect the tension value on the conveyor belt;

[0049] The controller adjusts the output powers of the first motor set and the second motor set according to the tension value.

[0050] The power ratio is further adjusted by controlling the frequency converter of the motor. For example, a 1000kW motor and a 630kW or 500kW motor can be selected, and their output powers are controlled by the frequency converter to achieve a power ratio of 2:1. At the same time, a driving roller with a diameter of 1000mm and a driving roller with a diameter of 800mm or 500mm can be selected to adapt to different working scenarios.

[0051] Determine the driving power of the driving points of each driving roller for driving the belt conveyor according to the power distribution of the belt conveyor, realize reasonable power distribution, ensure that the belt is subjected to uniform traction force and the driving points will not fail due to overload or underload, avoid slipping between the driving roller and the conveyor belt, and ensure the efficient and reliable operation of the conveyor belt system.

[0052] In another embodiment provided by the present invention, the difference between the first diameter of the first driving roller and the second diameter of the second driving roller is not less than a preset diameter threshold;

[0053] The ratio of the maximum output power of the first motor group to that of the second motor group is not less than a preset ratio threshold.

[0054] During the specific implementation of this embodiment, by selecting motors with different powers and driving rollers with different diameters, and combining the use of motor control frequency converters, a more flexible and optimized power distribution can be achieved, improving the working efficiency and performance of the belt conveyor. In practical applications, reasonable selection and configuration should be made according to specific situations to achieve the best working effect.

[0055] Exemplarily, through the asymmetric matching of driving rollers with different diameters (for example, Φ1000mm / Φ800mm / Φ630mm) and motors with different powers (for example, 1000kW / 630kW / 500kW), a dynamically adjustable tension-power coupling system is constructed.

[0056] To ensure a good asymmetric matching effect, the difference between the first diameter of the first driving roller and the second diameter of the second driving roller is not less than a preset diameter threshold; the ratio of the maximum output power of the first motor group to that of the second motor group is not less than a preset ratio threshold

[0057] Exemplarily, a combination of different-diameter driving rollers, such as Φ1000mm and Φ800mm, is selected to make the elastic deformation amount difference of the conveyor belt at each driving point reach 8 - 12%, naturally forming a tension gradient.

[0058] Motor groups with a maximum output power ratio greater than the preset value are selected, for example, 1000kW and 630kW, to improve the working efficiency and performance of the belt conveyor.

[0059] By dynamically matching the main drive with a large-diameter and high-power driving roller and the auxiliary drive with a small-diameter and low-power motor driving roller, the equivalent three-drive effect is achieved without changing the mechanical structure.

[0060] In another embodiment provided by the present invention, the tension detection device is used to detect the first tension value of the conveyor belt on the first driving roller and the second tension value of the conveyor belt on the second driving roller;

[0061] The controller adjusts the ratio of the output powers between the first motor group and the second motor group according to the first diameter of the first driving roller, the second diameter of the second driving roller, the first tension value, and the second tension value.

[0062] During the specific implementation of this embodiment, the tension detection device periodically (e.g., 10 times per second) collects the conveyor belt tension values at the two drums, calculates the actual tensions of the conveyor belt on each drum, and obtains the first tension value of the conveyor belt on the first driving drum and the second tension value of the conveyor belt on the second driving drum;

[0063] See Figure 2 , which is another structural schematic diagram of a driving system of a belt conveyor provided by an embodiment of the present invention. The controller calculates the power ratio of the two motor groups according to the drum diameters (D1, D2) and the tension difference. Through the dual adjustment of the diameter difference and the tension feedback, the driving torque of each drum is always consistent with the actual load demand, avoiding drum slippage, using the large-diameter drum to carry heavy loads, and the motor groups automatically output high torque.

[0064] In another embodiment provided by the present invention, the controller is further configured to:

[0065] Real-time detect the tension difference between the first tension value and the second tension value, and calculate the difference ratio between the tension difference and the first tension value;

[0066] When the difference ratio is within a preset normal range, calculate the power ratio of the output powers between the first motor group and the second motor group according to a preset calculation model, and adjust the output powers of the first motor group and the second motor group with the preset power ratio.

[0067] During the specific implementation of this embodiment, by real-time monitoring the tension difference and its ratio of the conveyor belt in the double-driving drum drive system, the output power distribution of the two motor groups is dynamically adjusted, and the core principle is based on the tension balance theory and power matching logic of belt drives.

[0068] The real-time tension difference ΔT, that is, the difference between the tension value T1 of the conveyor belt at the first driving drum and the tension value T2 of the conveyor belt at the second driving drum, ΔT = |T1 - T2|, reflects the difference in the driving force distribution of the two drums on the conveyor belt. Calculate the difference ratio K, and the ratio K of the tension difference to the first tension value is K = ΔT / T1, which is used to standardize the tension difference and eliminate the interference of the absolute value of the tension under different working conditions on the judgment.

[0069] Preset a normal range K, such as K ∈ [K min , K max .

[0070] It should be noted that when setting the normal range, factors such as the allowable tension range of the conveyor belt material, the friction coefficient between the driving drum and the conveyor belt, and the anti-slip critical condition (it is necessary to satisfy the Euler formula: T1 / T2 ≤ e μα , where μ is the friction coefficient and α is the wrap angle), the power redundancy and efficiency range of the motor groups, etc. are considered.

[0071] Determine whether K is within a preset normal range;

[0072] If so, execute the power ratio calculation model to calculate the power ratio of the output powers between the first motor group and the second motor group, and adjust P1 / P2 to the power ratio.

[0073] If not: Trigger an alarm or emergency shutdown (if K exceeds the anti-skid critical value, manual intervention is required to adjust the mechanical parameters).

[0074] The controller repeats the above process at a fixed period (such as 100 ms) to form a tension power feedback closed loop to adapt to the load fluctuation of the conveyor belt.

[0075] By real-time monitoring of the tension difference ratio, ensure that the tensions at the two rollers always meet the anti-skid conditions of the Euler formula. Dynamically adjust the motor output according to the actual tension demand, reduce the side wear and tensile fatigue of the conveyor belt caused by uneven tension, and extend the service life of the conveyor belt. Real-time control can quickly respond to the changes in working conditions, maintain the stable operation of the system, and reduce the frequency of shutdown maintenance.

[0076] In another embodiment provided by the present invention, the calculation model is:

[0077]

[0078] Wherein, ΔT is the tension difference between the first tension value and the second tension value, μ1 is the friction coefficient of the first driving roller, μ2 is the friction coefficient of the second driving roller, D1 is the first diameter, D2 is the second diameter, and α is a preset correction coefficient.

[0079] In the specific implementation of this embodiment, by introducing a calculation model including the roller diameter ratio, friction coefficient ratio and tension difference, a quantitative relationship between the tension difference and power distribution is established.

[0080]

[0081] The diameters (D1, D2) of the driving rollers directly affect the roller linear velocity. If the rotational speeds of the two rollers are the same (n1 = n2), the roller with a larger diameter has a higher linear velocity and needs to match a larger power to drive the conveyor belt with the same tension.

[0082] The square term of the diameter ratio in the model reflects the positive correlation between the square of the linear velocity and the power (Power P ∝ v2, because P = F·v and the driving force F is related to the tension difference).

[0083] The friction coefficient determines the maximum static friction force between the roller and the conveyor belt. The larger the friction coefficient, the greater the driving force that the roller can transmit, and the motor power required can be reduced accordingly.

[0084] The friction coefficient ratio in the model reflects the difference in driving forces between the two drums: if μ1 > μ2, the first drum can transfer the same tension difference with less power.

[0085] The tension difference ΔT = ∣T1 - T2∣ directly reflects the imbalance degree of the driving forces between the two drums.

[0086] The exponential term (e α×ΔT ) makes the power distribution more sensitive to the tension difference through the non-linear amplification effect, and is especially suitable for working conditions with large tension fluctuations.

[0087] The correction coefficient α is used to adjust the response sensitivity of the model to the tension difference, and can be optimized through on-site debugging (for example, taking a larger value in heavy-load scenarios and a smaller value in light-load scenarios).

[0088] The friction coefficient can be obtained by actual measurement of the drum surface material and the conveyor belt roughness or by looking up a table;

[0089] The initial value of the correction coefficient α can be set to 0.1 - 0.5 and optimized according to the operation data later.

[0090] The tension detection device obtains T1 and T2 in real time and calculates ΔT = ∣T1 - T2∣.

[0091] During the model calculation, the controller substitutes the parameters for calculation and determines the target power ratio P1 / P2 = K.

[0092] By combining mechanical characteristics such as drum diameter and friction coefficient with the tension dynamically through the quantization model, the non-linear precise adjustment of the power ratio is realized.

[0093] In another embodiment provided by the present invention, the controller is further configured to:

[0094] When the difference ratio is not within the normal range, increase the output power of the larger-diameter driving drum among the first driving drum and the second driving drum at a preset first ratio, and decrease the output power of the other driving drum at a preset second ratio.

[0095] During the specific implementation of this embodiment, this solution solves the risk of slipping between the driving drum and the conveyor belt caused by abnormal tension difference by dynamically adjusting the output power distribution of the double driving drums.

[0096] If the difference ratio exceeds this range, it indicates that the driving forces of the two drums do not match the tension, and power adjustment needs to be started to trigger the different-diameter compensation mechanism.

[0097] The output power of the large-diameter drum (such as the second drum) is increased at a first ratio (such as +10%); the output power of the small-diameter drum (such as the first drum) is decreased at a second ratio (such as -5%).

[0098] The driving roller with a larger diameter usually bears a greater driving force. When the tension difference exceeds the normal range, the power of the large-diameter roller is preferentially adjusted to quickly respond to the tension fluctuation. By preferentially enhancing the power of the large-diameter roller and utilizing its greater torque output capacity (torque ∝ diameter × tension), the friction between the roller and the conveyor belt is quickly increased to inhibit the slipping tendency. For example, when the tension on the large roller side suddenly increases, increasing its power can avoid the lagging slip caused by insufficient driving force.

[0099] The proportional values need to be pre-adjusted and determined according to the load characteristics of the equipment. Usually, the first ratio is greater than the second ratio to quickly enhance the driving force of the large roller.

[0100] Through the differential adjustment of "increasing the power of the roller with a larger diameter and decreasing the power of the other roller", the driving forces of the two rollers and the conveyor belt tension are quickly balanced, the friction between the roller and the conveyor belt is increased, and the slipping tendency is inhibited. For example, when the tension on the large roller side suddenly increases, increasing its power can avoid the lagging slip caused by insufficient driving force.

[0101] In another embodiment provided by the present invention, the controller is further configured to:

[0102] When it is detected that both the first tension value and the second tension value are less than a preset tension threshold, the output power of the smaller-diameter driving roller among the first driving roller and the second driving roller is reduced at a preset third ratio.

[0103] During the specific implementation of this embodiment, for the no-load condition of the conveyor belt (tension value lower than the threshold), by differentially adjusting the output powers of the double driving rollers, energy conservation and consumption reduction are achieved while ensuring the stable operation of the conveying system.

[0104] When the conveyor belt is unloaded, the tension is low, and the driving force required by the roller (torque = tension × radius) is significantly reduced. Especially for the smaller-diameter roller, due to its smaller radius, the required power is already lower than that of the larger-diameter roller. Further reducing its power can avoid "power redundancy".

[0105] The output power of the smaller-diameter roller is reduced at a preset third ratio (such as -20% to -30%). For example: If the original power of the smaller-diameter roller is P1, the adjusted power is P1 × (1 - the third ratio).

[0106] The power of the larger-diameter roller remains unchanged or is only slightly adjusted (such as maintaining the minimum power required for no-load operation) to ensure the conveyor belt runs at a constant speed and avoid deviation caused by the power imbalance of the double rollers. Retaining the power of the larger-diameter roller can ensure that it continuously provides a stable driving force and avoid speed fluctuations or slack of the conveyor belt caused by the simultaneous reduction of the power of the double rollers.

[0107] In another embodiment provided by the present invention, the ratio of the first diameter of the first drive roller to the second diameter of the second drive roller is a preset first diameter ratio;

[0108] When the controller receives a start signal, it controls the first motor group and the second motor group to start with a preset first power ratio.

[0109] In the specific implementation of this embodiment, through the matching relationship between the preset diameter ratio and the power ratio, the coordinated control of the driving forces of the double drive rollers is realized in the starting stage.

[0110] When starting, the conveyor belt is in a static state and needs to overcome the maximum static friction force. To avoid slippage or overload caused by unreasonable power distribution between the two rollers, it is necessary to preset the power ratio according to the diameter ratio so that the torque outputs of the two are proportional to the diameters, ensuring balanced driving forces.

[0111] When the controller receives a start signal, the following steps are executed:

[0112] Synchronously start the motor groups: Send start commands to the first motor group and the second motor group simultaneously to avoid local overload of the conveyor belt caused by a single roller starting first.

[0113] Output according to the preset power ratio:

[0114] The output power of the first motor group is P1 = kP × P0 (P0 is the reference power, such as the starting power calculated according to the load, kP is the first power ratio); the output power of the second motor group is P2 = P0.

[0115] It should be noted that the controller can also monitor the current values of the two motors in real time during the starting process. If the current of a certain motor exceeds 120% of the rated value, the current limiting protection is automatically triggered, and the power of the two motors is reduced proportionally (such as reduced to 80% P0) to avoid overload tripping.

[0116] After the conveyor belt reaches the rated speed and the tension is stable (usually lasting for 5 - 10 seconds), the controller switches to the normal operation mode (power adjustment logic based on real-time tension), and ends the fixed power control in the starting stage.

[0117] In another embodiment provided by the present invention, the first diameter ratio is 1.25;

[0118] The first power ratio is 2.5.

[0119] In the specific implementation of this embodiment, the first diameter ratio is 1.25;

[0120] When specifically used, a first drive roller with a diameter of 1000 mm and a second drive roller with a diameter of 800 mm are selected.

[0121] In the start-up stage, a temporary over-ratio of 2.5:1 - 3:1 is adopted. When specifically applied, a ratio of 2.5 is used, that is, the main drive outputs 1000 kW fully, and the auxiliary drive outputs 400 kW with a limit.

[0122] In another embodiment provided by the present invention, the hardness of the end part of the larger-diameter driving roller among the first driving roller and the second driving roller is higher than that of the middle part.

[0123] The surfaces of the first driving roller and the second driving roller are provided with spiral groove anti-slip patterns.

[0124] When specifically implementing this embodiment, the larger-diameter roller bears the main wear. Among the first driving roller and the second driving roller, the larger-diameter driving roller bears the main wear. Through asymmetric wear control, the contact stress at the end part is significantly increased.

[0125] By locally strengthening the hardness (such as surface quenching, surfacing wear-resistant layers), the hardness of the end part is made higher than that of the middle part, which can specifically improve the wear resistance and balance the wear rate of the entire circumference of the roller.

[0126] The surfaces of the first driving roller and the second driving roller are provided with spiral groove anti-slip patterns. The spiral grooves improve the friction coefficient between the roller and the conveyor belt in the following ways: mechanical meshing effect: the grooves are embedded in the surface of the conveyor belt to form a "tooth-groove" biting structure; drainage and chip removal function: the spiral grooves can quickly discharge foreign matters such as water and dust between the roller and the conveyor belt, avoiding the lubricating medium from reducing the friction force; stress dispersion effect: the spiral line pattern makes the contact stress evenly distributed along the circumference, reducing local slipping.

[0127] The above is the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A driving system of a belt conveyor, characterized in that, The system includes: A conveyor belt; A first driving roller and a second driving roller for driving the conveyor belt, wherein the first driving roller and the second driving roller are configured with different diameters; A first motor group for driving the first driving roller, and a second motor group for driving the second driving roller; A tension detection device disposed on the conveyor belt for detecting the tension value on the conveyor belt; A controller for adjusting the output power of the first motor group and the second motor group according to the tension value.

2. The drive system of the belt conveyor according to claim 1, characterized in that, The difference between the first diameter of the first driving roller and the second diameter of the second driving roller is not less than a preset diameter threshold; The ratio of the maximum output power of the first motor group to the maximum output power of the second motor group is not less than a preset ratio threshold.

3. The drive system of the belt conveyor according to claim 1, characterized in that, The tension detection device is used to detect a first tension value of the conveyor belt on the first driving roller and a second tension value of the conveyor belt on the second driving roller; The controller adjusts the ratio of the output power between the first motor group and the second motor group according to the first diameter of the first driving roller, the second diameter of the second driving roller, the first tension value and the second tension value.

4. The drive system of the belt conveyor according to claim 3, characterized in that, The controller is further configured to: Real-time detect the tension difference between the first tension value and the second tension value, and calculate the difference ratio between the tension difference and the first tension value; When the difference ratio is within a preset normal range, calculate the power ratio of the output power between the first motor group and the second motor group according to a preset calculation model, and adjust the output power of the first motor group and the second motor group with the preset power ratio.

5. The drive system of the belt conveyor according to claim 4, characterized in that, The calculation model is: Wherein, ΔT is the tension difference between the first tension value and the second tension value, μ1 is the friction coefficient of the first driving roller, μ2 is the friction coefficient of the second driving roller, D1 is the first diameter, D2 is the second diameter, and α is a preset correction coefficient.

6. The drive system of the belt conveyor according to claim 4, characterized in that, The controller is further configured to: When the difference ratio is not within the normal range, increase the output power of the driving roller with the larger diameter among the first driving roller and the second driving roller at a preset first ratio, and decrease the output power of the other driving roller at a preset second ratio.

7. The drive system of the belt conveyor according to claim 3, characterized in that, The controller is further configured to: When it is detected that both the first tension value and the second tension value are less than a preset tension threshold, decrease the output power of the driving roller with the smaller diameter among the first driving roller and the second driving roller at a preset third ratio.

8. The drive system of the belt conveyor according to claim 1, characterized in that, The ratio of the first diameter of the first driving roller to the second diameter of the second driving roller is a preset first diameter ratio; When receiving a start signal, the controller controls the first motor group and the second motor group to start with a preset first power ratio.

9. The drive system of the belt conveyor according to claim 8, characterized in that, The first diameter ratio is 1.25; The first power ratio is 2.

5.

10. The drive system of the belt conveyor according to claim 9, characterized in that, The hardness of the end part of the driving roller with the larger diameter among the first driving roller and the second driving roller is higher than that of the middle part; The surfaces of the first driving roller and the second driving roller are provided with spiral groove anti-slip patterns.

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