Automatic tensioning device for belt of powder concentrator of vertical mill

Abstract

The utility model belongs to the technical field of grinding devices, and relates to an automatic belt tensioning device for a powder concentrator of a vertical mill, which comprises a tensioning wheel, a support, a fixed base, a tensioning spring, a fixed sheet, a gasket and a connecting rod, the tensioning wheel is rotatably connected to one end of the support, the middle of the support is rotatably connected to the fixed base, and the other end of the support is rotatably connected with the connecting rod. A sliding hole is formed in the fixing piece, the connecting rod penetrates through the sliding hole and is in sliding connection with the sliding hole, the end, away from the support, of the connecting rod is connected with a gasket, the connecting rod is movably sleeved with the tensioning spring, the two ends of the tensioning spring abut against the gasket and the fixing piece respectively, and the fixing base and the fixing piece are fixed to the corresponding positions of the top of the vertical mill powder concentrator respectively. And the wheel surface of the tensioning wheel is tightly contacted with the belt of the vertical mill powder concentrator. The device does not need manual intervention, can automatically adjust the tensioning force of the belt in real time, ensures that the belt is always in an optimal tensioning state, enables the belt to be uniformly stressed, reduces the breakage probability, and prolongs the service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding equipment, specifically, it relates to an automatic belt tensioning device for a vertical mill classifier. Background Technology

[0002] Vertical mills (SCMs) are common grinding equipment widely used in industries such as building materials, metallurgy, and chemicals. One of their core components is the classifier, which uses a motor and reducer connected by a belt to drive the blades, achieving the screening and separation of ground materials. In actual production, the stable operation of the classifier has a significant impact on the overall production efficiency and product quality of the vertical mill system. Currently, vertical mill classifiers generally use belt drives. During transmission, the belt bears considerable tension and friction, and after a period of operation, it may fail to maintain sufficient tension. Insufficient belt tension can lead to the following problems:

[0003] 1. Uneven stress: During operation, insufficient belt tension can reduce the friction between the belt and the hub, causing the belt to slip during transmission and resulting in uneven stress.

[0004] 2. Shortened belt life: Uneven stress can accelerate localized wear on the belt, reducing its lifespan. Frequent belt replacements not only increase maintenance costs but may also disrupt production schedules.

[0005] 3. Reduced transmission efficiency: Insufficient belt tension will lead to increased energy loss during transmission, reduce transmission efficiency, and thus affect the overall performance of the vertical mill.

[0006] Therefore, ensuring the belt of a vertical mill classifier is fully tensioned is crucial for improving equipment operational stability, reducing maintenance costs, extending belt lifespan, and ensuring production safety. However, no suitable automatic belt tensioning device for vertical mill classifiers has been found in the existing technology. Therefore, it is necessary for those skilled in the art to develop an automatic belt tensioning device for vertical mill classifiers to improve their operational performance. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides an automatic belt tensioning device for a vertical mill classifier. Using the device provided by this utility model, the belt of the vertical mill classifier can be automatically tensioned, ensuring uniform belt stress, reducing the probability of breakage, and extending service life.

[0008] To achieve the above objectives, this utility model provides an automatic belt tensioning device for a vertical mill classifier, comprising a tensioning wheel, a bracket, a fixed base, a tensioning spring, a fixing plate, a washer, and a connecting rod. The tensioning wheel is rotatably connected to one end of the bracket, the middle of the bracket is rotatably connected to the fixed base, and the other end of the bracket is rotatably connected to the connecting rod. The fixing plate has a sliding hole, the connecting rod passes through the sliding hole and is slidably connected to the sliding hole, and the end of the connecting rod away from the bracket is connected to the washer. The tensioning spring is movably sleeved on the connecting rod, and both ends of the tensioning spring abut against the washer and the fixing plate, respectively. The fixed base and the fixing plate are respectively fixed at corresponding positions on the top of the vertical mill classifier, so that the wheel surface of the tensioning wheel is in close contact with the belt of the vertical mill classifier.

[0009] Furthermore, the bracket is L-shaped, and the fixed base is located below the corner of the bracket, which facilitates the positioning and adjustment of the bracket.

[0010] Furthermore, a screw and a guide rod are respectively provided on both sides of the corner of the bracket. A circular connecting hole and a fan-shaped guide groove are correspondingly provided on the fixed base. The screw passes through the connecting hole and is threaded with a nut, and the screw is rotatably connected to the connecting hole. The guide rod is slidably connected within the guide groove. The guide rod and guide groove are used to adjust the position between the tension wheel and the belt. During use, if the belt exerts excessive pressure on the tension wheel, the guide rod moves within the guide groove of the fixed base, thereby causing the bracket and tension wheel to rotate until the tension spring's tension balances with the belt pressure, achieving automatic tensioning.

[0011] Furthermore, the connecting rod and the bracket are rotatably connected by a pin. When the bracket rotates, the connecting rod will also rotate around the pin on the bracket.

[0012] Furthermore, the end of the connecting rod furthest from the bracket is provided with an external thread, and the washer is disc-shaped with a threaded hole at its center that matches the external thread. The washer is threadedly connected to the connecting rod through the threaded hole. This design facilitates the disassembly or replacement of the tension spring as needed.

[0013] This utility model also includes other devices or components that enable the automatic belt tensioning device of the vertical mill classifier to function properly, all of which are conventional technical means in the field. Furthermore, devices or components not specified in this utility model, such as tensioning wheels and tensioning springs, all employ conventional technical means in the field.

[0014] The working principle of this utility model is as follows: During use, the tensioning pulley is in close contact with the belt. When the motor is running, the belt drives the tensioning pulley to rotate. When the pressure on the tensioning pulley changes, the tensioning spring provides tension and pressure in a timely manner. The tensioning spring can automatically apply tension when the belt is slack, and can automatically release part of the tension when the belt is tensioned, ensuring close contact between the tensioning pulley and the belt, and realizing automatic belt tensioning.

[0015] The beneficial effects of this invention are that, during use, the device can automatically and in real time adjust the belt tension without manual intervention, ensuring that the belt is always in the optimal tension state. By maintaining the optimal belt tension, the transmission efficiency between the motor and the reducer is improved, energy loss is reduced, and excessive wear caused by the belt being too loose or too tight is avoided, thus extending the belt's service life. Simultaneously, it ensures the stable operation of the vertical mill classifier, improving the stability of the vertical mill production process and product quality. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention in the embodiment.

[0018] Figure 2 This is a front structural diagram of the present invention in an embodiment.

[0019] Figure 3 This is a side view of the present invention in an embodiment.

[0020] Figure 4 This is a top view of the present invention in the embodiment.

[0021] In the diagram: 1-Tensioning wheel, 2-Bracket, 3-Fixed base, 4-Tensioning spring, 5-Fixing plate, 6-Washer, 7-Connecting rod, 8-Screw, 9-Guide rod, 10-Guide groove, 11-Pin. Detailed Implementation

[0022] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0023] Example

[0024] like Figures 1-4As shown, this utility model provides an automatic belt tensioning device for a vertical mill classifier, including a tensioning wheel 1, a bracket 2, a fixed base 3, a tensioning spring 4, a fixing plate 5, a gasket 6, and a connecting rod 7. The tensioning wheel is rotatably connected to one end of the bracket, the middle of the bracket is rotatably connected to the fixed base, and the other end of the bracket is rotatably connected to the connecting rod. The fixing plate has a sliding hole, the connecting rod passes through the sliding hole and is slidably connected to the sliding hole, and the end of the connecting rod away from the bracket is connected to the gasket. The tensioning spring is movably sleeved on the connecting rod, and both ends of the tensioning spring abut against the gasket and the fixing plate, respectively. The fixed base and the fixing plate are respectively fixed at corresponding positions on the top of the vertical mill classifier (not shown in the figure), so that the wheel surface of the tensioning wheel is in close contact with the belt of the vertical mill classifier (not shown in the figure).

[0025] In this embodiment, the bracket is L-shaped, and the fixed base is located below the corner of the bracket. This arrangement facilitates the limiting and adjustment of the bracket. A screw 8 and a guide rod 9 are respectively provided on both sides of the corner of the bracket. The fixed base has a corresponding circular connecting hole and a fan-shaped guide groove 10. The screw passes through the connecting hole and is threaded with a nut (not shown in the figure), and the screw is rotatably connected to the connecting hole. The guide rod is slidably connected in the guide groove. The guide rod and guide groove are used to adjust the position between the tension wheel and the belt. During use, if the belt exerts excessive pressure on the tension wheel, the guide rod moves in the guide groove of the fixed base, thereby driving the bracket and the tension wheel to rotate until the tension of the tension spring is balanced with the belt pressure, achieving an automatic tensioning effect.

[0026] Continuing with the above embodiment, the connecting rod and the bracket are rotatably connected via a pin 11. When the bracket rotates, the connecting rod also rotates around the pin on the bracket. The end of the connecting rod furthest from the bracket has an external thread. The washer is disc-shaped, and its center has a threaded hole that matches the external thread. The washer is threadedly connected to the connecting rod through the threaded hole. This design facilitates the disassembly or replacement of the tension spring as needed.

[0027] The working principle of this utility model is as follows: During use, the tensioning pulley is in close contact with the belt. When the motor is running, the belt drives the tensioning pulley to rotate. When the pressure on the tensioning pulley changes, the tensioning spring provides tension and pressure in a timely manner. The tensioning spring can automatically apply tension when the belt is slack, and can automatically release part of the tension when the belt is tensioned, ensuring close contact between the tensioning pulley and the belt, and realizing automatic belt tensioning.

[0028] The embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An automatic belt tensioning device for a vertical mill classifier, comprising a tensioning wheel, characterized in that: It also includes a bracket, a fixed base, a tension spring, a fixing plate, a gasket, and a connecting rod. The tension wheel is rotatably connected to one end of the bracket, the middle of the bracket is rotatably connected to the fixed base, and the other end of the bracket is rotatably connected to the connecting rod. The fixing plate has a sliding hole, the connecting rod passes through the sliding hole and is slidably connected to the sliding hole, and the end of the connecting rod away from the bracket is connected to the gasket. The tension spring is movably sleeved on the connecting rod, and both ends of the tension spring abut against the gasket and the fixing plate, respectively. The fixed base and the fixing plate are respectively fixed at corresponding positions on the top of the vertical mill classifier, so that the wheel surface of the tension wheel is in close contact with the belt of the vertical mill classifier.

2. The automatic belt tensioning device for a vertical mill classifier according to claim 1, characterized in that: The bracket is L-shaped, and the fixed base is located below the corner of the bracket.

3. The automatic belt tensioning device for a vertical mill classifier according to claim 2, characterized in that: The bracket has a screw and a guide rod on each side of the corner. The fixed base has a circular connecting hole and a fan-shaped guide groove. The screw passes through the connecting hole and is threaded with a nut. The screw is rotatably connected to the connecting hole. The guide rod is slidably connected in the guide groove.

4. The automatic belt tensioning device for a vertical mill classifier according to claim 1, characterized in that, The connecting rod and the bracket are rotatably connected by a pin.

5. The automatic belt tensioning device for a vertical mill classifier according to claim 1, characterized in that: The connecting rod has an external thread at the end away from the support. The washer is disc-shaped and has a threaded hole at the center that matches the external thread. The washer is threadedly connected to the connecting rod through the threaded hole.

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