A forced air-cooled high-power MRF speed regulation roller

Abstract

The application discloses a forced air-cooled high-power MRF speed regulation roller, which mainly comprises a main shaft, a driving friction plate, a driven friction plate, a radial fan and a roller, etc. The support sleeve is installed on the main shaft through the inner thread, and the radial fan is connected with the main shaft through the thread. The inner gear of the driving friction plate is matched with the support sleeve through the key groove, and the outer gear of the driven friction plate is matched with the sealing ring through the key groove. The excitation coil is located between the roller and the sealing ring and rotates with the roller. The end disc is provided with liquid injection bolts, and the support disc is provided with liquid discharge bolts. The working medium of the speed regulation roller is the magnetorheological fluid, the torque and the speed difference between the driving friction plate and the driven friction plate are changed by changing the current of the excitation coil, and then the speed of the roller is adjusted. Meanwhile, the radial fan arranged on the main shaft can be forced air-cooled. The application has the advantages of simple structure, convenient operation, high power and strong heat dissipation performance.

Description

Technical Field

[0001] This invention relates to the field of speed-regulating rollers, and specifically to a forced air-cooled high-power MRF speed-regulating roller. Background Technology

[0002] Speed-regulating rollers, as an important component of transmission and conveying systems, have wide applications in transmission machinery. Existing speed-regulating rollers include those driven by asynchronous motors and those driven by direct-drive motors. Asynchronous motor-driven rollers adjust speed by changing the frequency of the asynchronous motor; direct-drive rollers control the rotational speed by changing the current frequency. To date, many patents have improved upon existing speed-regulating rollers. CN113027997A discloses a multi-functional harvesting machinery adjustable speed roller transmission box that achieves speed regulation by changing the gear ratio; CN214454501U discloses an adjustable speed transmission roller; and CN109132356A discloses an adjustable speed hydraulic axial piston type transmission roller.

[0003] The above analysis shows that traditional speed-regulating rollers still suffer from complex structures, poor heat dissipation, and low power consumption. Magnetorheological fluids, with their fast response, high torque transmission, and low energy consumption, can effectively solve these problems when applied to speed-regulating rollers. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a forced air-cooled high-power MRF speed-regulating roller, which features a simple structure, convenient operation, and good heat dissipation performance.

[0005] To address the aforementioned shortcomings, the present invention adopts the following technical solution: a forced-air-cooled high-power MRF speed-regulating drum, mainly composed of a drum, an excitation coil, a radial fan, an end plate, a support plate, a main shaft, an active component, and a driven component; characterized in that the drum is fixed between the end plate and the support plate, the excitation coil is placed between the drum and the driven component, and rotates together with the drum; the main shaft is mounted on the end plate via bearings, and mounted on the support plate via bearings and bushings; the radial fan is threadedly connected to the main shaft; the end plate is provided with an injection bolt, and the support plate is provided with a drain bolt;

[0006] The active component includes an active friction plate and a support sleeve; the internal teeth of the active friction plate engage with the support sleeve via a keyway, and an inner retainer is provided between the active friction plates; the support sleeve is installed on the main shaft via an internal thread, and a retaining ring is provided between the support sleeve and the main shaft, while dynamic sealing rings are provided between the support sleeve and the end plate and the support plate respectively;

[0007] The driven assembly includes a driven friction plate and a sealing ring; the outer teeth of the driven friction plate are engaged with the sealing ring through a keyway, and an outer retainer is provided between the driven friction plates; the sealing ring is placed inside the excitation coil, and a dynamic sealing ring is provided between the sealing ring and the end plate and the support plate;

[0008] Furthermore, the roller, active friction plate, driven friction plate, end plate, and support plate are all made of soft magnetic 20 low-carbon steel;

[0009] Furthermore, the main shaft is made of non-magnetic material 1Cr18Ni9Ti, and the support sleeve is made of non-magnetic material copper.

[0010] Furthermore, the active friction plate and the driven friction plate are stacked on top of each other, with an installation interval of 1-2mm;

[0011] Furthermore, the end plate has an annular hollow structure, and heat dissipation holes are opened on the support sleeve, support plate and bushing.

[0012] Furthermore, the radial fan can be forced to cool down by rotating with the main shaft;

[0013] Furthermore, the end plate has wire holes, and the roller can change its rotation speed by passing the current through the wire holes to achieve speed regulation.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) The end plate of the present invention has a hollow structure, and ventilation holes are provided on the support sleeve, support plate and shaft sleeve. The radial fan installed on the main shaft can perform forced heat dissipation, and the overall heat dissipation effect is good.

[0016] (2) The present invention can change the torque and speed difference between the active friction plate and the driven friction plate by controlling the magnitude of the current, thereby adjusting the speed of the drum, which is convenient to operate. Attached Figure Description

[0017] Figure 1 This is an assembly diagram of a forced air-cooled high-power MRF speed-regulating drum according to the present invention;

[0018] Figure 2 This is a structural diagram of the support sleeve of the present invention;

[0019] Figure 3 This is a structural diagram of the active friction plate of the present invention;

[0020] Figure 4 This is a structural diagram of the driven friction plate of the present invention;

[0021] Explanation of reference numerals in the attached drawings: 1-Drum, 2-Excitation coil, 3, 6, 17-Dynamic seal ring, 4-Active friction plate, 5-Driven friction plate, 7-Support sleeve, 8-Bearing I, 9-Radiation fan, 10-End plate, 11-Inner cage, 12-Outer cage, 13-Injection bolt, 14-Sealing ring, 15-Wire hole, 16-Support plate, 18, 24, 25-Heat dissipation hole, 19-Retaining ring, 20-Bearing II, 21-Shaft sleeve, 22-Main shaft, 23-Drain bolt. Detailed Implementation

[0022] like Figures 1 to 4 As shown, the present invention mainly includes a drum 1, an excitation coil 2, dynamic sealing rings (3, 6, 17), an active friction plate 4, a driven friction plate 5, a support sleeve 7, a bearing I 8, a radial fan 9, an end plate 10, an inner cage 11, an outer cage 12, a liquid injection bolt 13, a sealing ring 14, a wire hole 15, a support plate 16, heat dissipation holes (18, 24, 25), a retaining ring 19, a bearing II 20, a bushing 21, a main shaft 22, and a drain bolt 23.

[0023] like Figure 1 As shown in the schematic diagram of the present invention, the main shaft 22 is mounted on the end plate 10 via bearing I 8, and on the support plate 16 via bearing II 20 and bushing 21. The main shaft 22 is threadedly connected to the support sleeve 7 and the radial fan 9. At the same time, a retaining ring 19 is provided between the support sleeve 7 and the main shaft 22. The support plate 7 and the sealing ring 14 are respectively equipped with active friction plate 4 and driven friction plate 5 via keyways. The excitation coil 2 is placed between the drum 1 and the sealing ring 14. Dynamic sealing rings (3, 6, 17) are installed between the support sleeve 7, the end plate 10, the sealing ring 14 and the support plate 16.

[0024] The end plate 10 has a hollow structure and works together with the heat dissipation holes on the support sleeve 7, support plate 16 and bushing 21 to dissipate heat with the radial fan; the end plate 10 has wire holes 15, and the rotation speed is adjusted by changing the current in the holes.

[0025] like Figure 2 As shown in the schematic diagram of the support sleeve of the present invention, the support sleeve 7 is installed on the main shaft 22 by a threaded connection and has heat dissipation holes (24, 25).

[0026] like Figures 3 to 4 As shown in the schematic diagram of the active friction plate and the driven friction plate of the present invention, the active friction plate 4 and the driven friction plate 5 are respectively mounted on the support sleeve 7 and the sealing ring 14 through keyways; an inner retainer 11 is provided between the active friction plates 4, and an outer retainer 12 is provided between the driven friction plates 5.

[0027] A speed regulation method for a forced air-cooled high-power MRF speed-regulating roller: The space between the active friction plate 4 and the driven friction plate 5 is filled with magnetorheological fluid. Under the action of the excitation coil 2, the magnetic particles of the magnetorheological fluid are arranged into a chain structure along the magnetic field direction. The relative motion between the active friction plate 4 and the driven friction plate 5 causes the chain structure to be subjected to the shear force of the magnetorheological fluid film. By controlling the magnitude of the current in the wire hole 15, the magnetic field strength is changed, thereby changing the torque between the active friction plate 4 and the driven friction plate 5, thus achieving the purpose of changing the roller speed. At the same time, the radial fan 9 rotates with the main shaft 22 to provide forced heat dissipation for the magnetorheological fluid.

[0028] The above embodiments are merely descriptions of preferred embodiments of the invention and are not intended to limit the scope of the invention. Without departing from the spirit of the invention, various modifications and improvements to the invention by those skilled in the art should be included within the scope of protection defined by the claims.

Claims

1. A forced-air-cooled high-power MRF speed-regulating roller, comprising a roller (1), an excitation coil (2), a radial fan (9), an end plate (10), a support plate (16), a main shaft (22), an active component, and a driven component, characterized in that: The drum (1) is fixed between the end plate (10) and the support plate (16), and the excitation coil (2) is placed between the drum (1) and the driven component, rotating together with the drum (1); the main shaft (22) is mounted on the end plate (10) through bearing I (8), and on the support plate (16) through bearing II (20) and bushing (21); the radial fan (9) is connected to the main shaft (22) by a thread; the end plate (10) is provided with a liquid injection bolt (13), and the support plate (16) is provided with a liquid discharge bolt (23); The active component includes an active friction plate (4) and a support sleeve (7); the inner teeth of the active friction plate (4) cooperate with the support sleeve (7) through a keyway, and an inner retainer (11) is provided between the active friction plates (4); the support sleeve (7) is installed on the main shaft (22) through an inner thread, and a retaining ring (19) is provided between the support sleeve (7) and the main shaft (22). At the same time, dynamic sealing rings (6, 17) are respectively provided between the support sleeve (7) and the end plate (10) and the support plate (16). The driven assembly includes a driven friction plate (5) and a sealing ring (14); the outer teeth of the driven friction plate (5) are engaged with the sealing ring (14) through a keyway, and an outer retainer (12) is provided between the driven friction plates (5); the sealing ring (14) is placed inside the excitation coil (2), and a dynamic sealing ring (3) is provided between the sealing ring (14) and the end plate (10) and the support plate (16).

2. The forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The roller (1), active friction plate (4), driven friction plate (5), end plate (10) and support plate (16) are all made of soft magnetic 20 low carbon steel.

3. The forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The main shaft (22) is made of non-magnetic material 1Cr18Ni9Ti, and the support sleeve (7) is made of non-magnetic material copper.

4. A forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The active friction plate (4) and the driven friction plate (5) are stacked on top of each other, with an installation interval of 1-2 mm.

5. A forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The end plate (10) is a ring-shaped hollow structure, and heat dissipation holes (18, 24, 25) are opened on the support sleeve (7), support plate (16) and bushing (21).

6. A forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The radial fan (9) can rotate with the main shaft (22) to provide forced air cooling.

7. A forced air-cooled high-power MRF speed-regulating roller according to claim 1, characterized in that: The end plate (10) has a wire hole (15). The roller (1) changes its rotation speed by the magnitude of the current flowing through the wire hole (15) to achieve the purpose of speed regulation.

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