Multi-motion track circular vibrating screen structure

Abstract

The utility model discloses a kind of multi-motion trajectory circular vibration screen structures, including circular vibration screen main body, the outside surface of circular vibration screen main body is equipped with mounting bracket, main motor is provided on mounting bracket upper surface, the output shaft of main motor is connected with input shaft through belt pulley group, input shaft is rotatably arranged on mounting bracket, input shaft is connected with the main excitation shaft of circular vibration screen main body inside exciter by coupling, the main excitation shaft and vice excitation shaft are provided on exciter, the main excitation shaft and vice excitation shaft are engaged by a pair of synchronous gear, wherein the main excitation shaft is connected with fixed eccentric block by matching hole, vice excitation shaft is connected with adjustable eccentric block by matching hole, adjustable eccentric block can adjust the position of its matching hole. By adjusting eccentricity of adjustable eccentric block on vice excitation shaft online, different feeding conditions and screening process requirements are adapted, without replacing equipment or shutdown adjustment eccentric block, reduce equipment investment cost, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of circular vibrating screen technology, specifically a multi-motion trajectory circular vibrating screen structure. Background Technology

[0002] A circular vibrating screen is a high-efficiency screening device that uses a vibrator to generate centrifugal force, causing the screen box to vibrate in an approximately circular trajectory. Its working principle is that the material is subjected to a throwing motion on the screen surface, thereby achieving stratification and screening.

[0003] Currently, circular vibrating screens typically employ a vibrator consisting of two shafts equipped with fixed eccentric blocks that rotate synchronously in opposite directions via gears. This structure determines that the magnitude and direction of the generated excitation force are fixed, resulting in a single and unadjustable vibration trajectory of the screen box (e.g., circular or elliptical) and material projection angle. In actual production applications, material characteristics (e.g., particle size, moisture content, viscosity) and throughput frequently change. For vibrating screens with a fixed trajectory, when the throughput is large or the material is wet, the fixed projection angle may not provide sufficient throwing force to disperse the material, easily leading to screen clogging and a sharp drop in screening efficiency. When the throughput is small or fine screening is required, an excessively large projection angle will cause the material to pass through the screen surface too quickly, reducing the effective screening time and resulting in insufficient screening, thus affecting screening accuracy.

[0004] To address the needs of different operating conditions, users often need to equip multiple screens with different vibration parameters, or shut down the machine to replace the vibrator. This not only increases equipment investment costs but also reduces production efficiency and makes dynamic optimization impossible. Therefore, we propose a multi-motion trajectory circular vibrating screen structure. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a multi-motion trajectory circular vibrating screen structure that can adapt to different feeding conditions and screening process requirements. It does not require equipment replacement or machine shutdown for eccentric block adjustment, thus reducing equipment investment costs and improving production efficiency. It can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-motion trajectory circular vibrating screen structure, comprising a circular vibrating screen body, an mounting frame mounted on the outer surface of the circular vibrating screen body, a main motor mounted on the upper surface of the mounting frame, the output shaft of the main motor being connected to an input shaft via a pulley set, the input shaft being rotatably mounted on the mounting frame, and the input shaft being connected to the main excitation shaft of the vibrator inside the circular vibrating screen body via a coupling, the vibrator being provided with a main excitation shaft and a secondary excitation shaft, the main excitation shaft and the secondary excitation shaft being meshed by a pair of synchronous gears, wherein the main excitation shaft is connected to a fixed eccentric block via a mating hole, and the secondary excitation shaft is connected to an adjustable eccentric block via a mating hole, the adjustable eccentric block being able to adjust the position of its mating hole.

[0007] As a preferred technical solution of the present utility model, a chute is provided on a side surface of the adjustable eccentric block, a sliding seat is slidably arranged in the chute, and a fitting hole of the adjustable eccentric block is provided on the sliding seat.

[0008] As a preferred technical solution of the present utility model, a plurality of positioning holes are provided on both sides of the side surface of the adjustable eccentric block and both sides of the side surface of the sliding seat, a fixing bolt is inserted into the positioning hole, and an end of the fixing bolt is threadedly connected with a fixing nut.

[0009] As a preferred technical solution of the present utility model, at least two groups of positioning holes are provided on the sliding seat.

[0010] As a preferred technical solution of the present utility model, at least two fixing nuts are provided on each fixing bolt.

[0011] As a preferred technical solution of the present utility model, the cross-sectional shape of the sliding seat is a "cross" shape, or the cross-sectional shape of the sliding seat is a "king" shape.

[0012] As a preferred technical solution of the present utility model, a plurality of adjusting scale lines are arranged on the side surface of the adjustable eccentric block close to the chute, and an indicating scale line corresponding to the adjusting scale lines is arranged on the side surface of the sliding seat.

[0013] As a preferred technical solution of the present utility model, wear-resistant liners are arranged on the inner side surface of the chute and at the contact position between the side surface of the adjustable eccentric block and the sliding seat.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: by adjusting the eccentricity of the adjustable eccentric block on the auxiliary excitation shaft online, the combined eccentric mass moment of the exciter system can be changed, so that the circular vibrating screen device can be flexibly switched between multiple modes such as "large processing capacity, strong throwing" and "high precision, stable screening", adapt to different feeding conditions and screening process requirements, eliminating the need to replace equipment or shut down to adjust the eccentric block, reducing equipment investment cost and improving production efficiency. Description of Drawings

[0015] Figure 1 is a structural schematic diagram of the main body of the circular vibrating screen of the present utility model; Figure 2 is a structural schematic diagram of the eccentric block of the present utility model; Figure 3 is a structural schematic diagram of the adjustable eccentric block of the present utility model; Figure 4 is a bottom-view structural schematic diagram of the adjustable eccentric block of the present utility model; Figure 5 is an internal structural schematic diagram of the adjustable eccentric block of the present utility model.

[0016] In the diagram: 1. Circular vibrating screen body, 2. Mounting frame, 3. Main motor, 4. Pulley group, 5. Input shaft, 6. Fixed eccentric block, 7. Adjustable eccentric block, 8. Mating hole, 9. Slide groove, 10. Sliding seat, 11. Positioning hole, 12. Fixing bolt, 13. Fixing nut, 14. Adjustment scale line, 15. Indicator scale line, 16. Wear-resistant bushing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a multi-motion trajectory circular vibrating screen structure, including a circular vibrating screen body 1. A mounting frame 2 is installed on the outer surface of the circular vibrating screen body 1. A main motor 3 is installed on the upper surface of the mounting frame 2. The output shaft of the main motor 3 is connected to an input shaft 5 through a pulley set 4. The pulley set 4 includes a driving pulley connected to the output shaft of the main motor 3 and a driven pulley installed on the input shaft 5, as well as belts installed on the driving pulley and the driven pulley. The input shaft 5 is rotatably mounted on the mounting frame 2. The input shaft 5 is connected to the main excitation shaft of the vibrator inside the circular vibrating screen body 1 through a coupling. The vibrator is equipped with a main excitation shaft and a secondary excitation shaft. The main excitation shaft and the secondary excitation shaft are meshed by a pair of synchronous gears and are driven by the main motor 3 to rotate synchronously in opposite directions through the pulley set 4, the input shaft 5, etc. The above structure are all common structural components of circular vibrating screens in the prior art. Their specific structure, working principle, control method, and circuit connection are all known technologies and will not be described in detail here.

[0019] The main excitation shaft of the vibrator is connected to the fixed eccentric block 6 via a mating hole 8, and the auxiliary excitation shaft is connected to the adjustable eccentric block 7 via a mating hole 8. The adjustable eccentric block 7 can adjust the position of its mating hole 8, thereby adjusting the eccentricity and thus changing the eccentric mass moment formed by it and the fixed eccentric block 6 on the main excitation shaft. When dealing with large feed rates or materials prone to clogging, the eccentricity of the adjustable eccentric block 7 can be increased to obtain a greater excitation force and projection angle, enhancing the throwing and diffusion of materials on the screen surface, effectively preventing clogging, and ensuring smooth and efficient screening at high flow rates. When dealing with difficult-to-screen materials, the projection angle can be reduced to increase the residence time of the material on the screen surface and improve screening accuracy.

[0020] When the feed volume is small or only light screening is required, the excitation force can be reduced by decreasing the eccentricity. This can reduce unnecessary energy consumption, reduce the dynamic load and fatigue damage of key components such as bearings and screens, and thus effectively extend the service life of the entire equipment.

[0021] The main excitation shaft and the auxiliary excitation shaft are connected and fixed to the mating hole 8 through a spline structure.

[0022] In a preferred embodiment, the adjustable eccentric block 7 has a groove 9 on its side surface, and a sliding seat 10 is slidably disposed in the groove 9. The mating hole 8 of the adjustable eccentric block 7 is opened on the sliding seat 10. By moving the sliding seat 10, the position of the mating hole 8 can be adjusted, thereby changing the center of gravity and eccentricity of the adjustable eccentric block 7, thus controlling the magnitude of the combined excitation force generated by the vibrator. Operators can flexibly adjust the screening intensity according to the feed rate, material characteristics, etc., without replacing the equipment or disassembling the entire vibrator, and optimize the screening efficiency. This solves the problem of insufficient adaptability of traditional vibrating screens due to their fixed motion trajectory.

[0023] In a further preferred technical solution, several positioning holes 11 are provided on both sides of the side surface of the adjustable eccentric block 7 and both sides of the side surface of the sliding seat 10. Fixing bolts 12 are inserted into the positioning holes 11, and fixing nuts 13 are threaded to the ends of the fixing bolts 12. The sliding seat 10 is fixed on the adjustable eccentric block 7 by the fixing bolts 12 and the fixing nuts 13, which provides a stable and reliable mechanical locking force for the adjustment of the eccentricity. This ensures that the adjustable eccentric block 7 will not shift under long-term high-intensity vibration conditions of the equipment, thereby ensuring the long-term stability of the set vibration trajectory and projection angle, and effectively eliminating performance fluctuations and safety hazards caused by loose parts.

[0024] More preferably, the positioning holes 11 on the sliding seat 10 are provided in three sets, that is, the sliding seat 10 is fixed to the adjustable eccentric block 7 by six fixing bolts 12, forming a multi-point rigid constraint, which enhances the connection rigidity and locking reliability between the sliding seat 10 and the adjustable eccentric block 7, and can evenly distribute the vibration load, effectively preventing the loosening or failure of a single connection point under long-term, high-intensity alternating excitation force, thereby ensuring the stability and safety of long-term operation.

[0025] Furthermore, each of the fixing bolts 12 is provided with at least two fixing nuts 13. The use of multiple nuts to prevent loosening provides strong mechanical interference and friction at the connection point, effectively resisting the bolt's own tendency to loosen and preventing the risk of eccentricity change, performance failure or even bolt falling off due to the loosening of a single fixing nut 13. This further improves the stability and safety of long-term operation.

[0026] Optionally, the cross-section of the sliding seat 10 is in a cross shape, or the cross-section of the sliding seat 10 is in a king-shaped structure, which can increase the contact area between the sliding seat 10 and the adjustable eccentric block 7 and the complexity of the shape of the joint surface, enhance the bending and torsional rigidity of the structure, effectively suppress the possible micro-deformation or displacement of the joint surface under high-frequency vibration, and ensure the stability of the locked state after the adjustment of the eccentricity is completed.

[0027] Further optionally, a wear-resistant bushing 16 is provided on the inner surface of the sliding chute 9 and at the contact position between the side surface of the adjustable eccentric block 7 and the sliding seat 10, which can concentrate the main wear of the sliding friction pair on the wear-resistant bushing 16. The wear-resistant bushing 16 is usually lower in cost, which can effectively protect the adjustable eccentric block 7 and the sliding seat 10 body that are higher in cost and more precisely processed from direct wear, prolong the service life of core components, and reduce the maintenance cost and shutdown risk caused by the loss of accuracy due to wear of key components.

[0028] Optionally, a plurality of adjustment scale lines 14 are provided on the side surface of the adjustable eccentric block 7 near the sliding chute 9, and an indicator marking line 15 corresponding to the adjustment scale lines 14 is provided on the side surface of the sliding seat 10, which provides an intuitive visual reference for the adjustment of the eccentricity. Operators can quickly and accurately position the sliding seat 10 to the preset optimal working position according to screening requirements, which improves the accuracy, efficiency and repeatability of the adjustment operation, and avoids screening effect deviation caused by inaccurate adjustment.

[0029] Parts not disclosed in the present utility model are all prior art, and the specific structures, materials and working principles thereof will not be described in detail herein. Although embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-motion trajectory circular vibrating screen structure, comprising a circular vibrating screen body (1), a mounting frame (2) mounted on the outer surface of the circular vibrating screen body (1), a main motor (3) mounted on the upper surface of the mounting frame (2), the output shaft of the main motor (3) being connected to an input shaft (5) via a pulley group (4), the input shaft (5) being rotatably mounted on the mounting frame (2), and the input shaft (5) being connected to the main excitation shaft of the vibrator inside the circular vibrating screen body (1) via a coupling, characterized in that: The vibrator is provided with a main excitation shaft and an auxiliary excitation shaft, and the main excitation shaft and the auxiliary excitation shaft are meshed through a pair of synchronous gears, wherein the main excitation shaft is connected with a fixed eccentric block (6) through a matching hole (8), the auxiliary excitation shaft is connected with an adjustable eccentric block (7) through a matching hole (8), and the adjustable eccentric block (7) can adjust the position of the matching hole (8) thereof.

2. The multi-motion trajectory circular vibrating screen structure according to claim 1, characterized in that: A sliding groove (9) is formed on the side surface of the adjustable eccentric block (7), a sliding seat (10) is slidably arranged in the sliding groove (9), and the matching hole (8) of the adjustable eccentric block (7) is formed on the sliding seat (10).

3. The multi-motion trajectory circular vibrating screen structure according to claim 2, characterized in that: A plurality of positioning holes (11) are respectively formed on both sides of the side surface of the adjustable eccentric block (7) and both sides of the side surface of the sliding seat (10), a fixing bolt (12) is inserted into the positioning hole (11), and an end of the fixing bolt (12) is threadedly connected with a fixing nut (13).

4. The multi-motion trajectory circular vibrating screen structure according to claim 3, characterized in that: At least two groups of the positioning holes (11) on the sliding seat (10) are provided.

5. The multi-motion trajectory circular vibrating screen structure according to claim 4, characterized in that: At least two fixing nuts (13) are provided on each fixing bolt (12).

6. The multi-motion trajectory circular vibrating screen structure according to claim 3, characterized in that: The cross-sectional shape of the sliding seat (10) is a cross shape, or the cross-sectional shape of the sliding seat (10) is a king-shaped shape.

7. The multi-motion trajectory circular vibrating screen structure according to claim 3, characterized in that: A plurality of adjusting scale lines (14) are arranged on the side surface of the adjustable eccentric block (7) near the sliding groove (9), and an indicator scale line (15) corresponding to the adjusting scale lines (14) is arranged on the side surface of the sliding seat (10).

8. A multi-motion trajectory circular vibrating screen structure according to any one of claims 2-7, characterized in that: A wear-resistant bushing (16) is arranged on the inner side surface of the sliding groove (9) and at the contact position between the side surface of the adjustable eccentric block (7) and the sliding seat (10).

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